From one student's post ...

      Saudi Arabia is a large country that covers most of the Arabian peninsula [1] and according to the CIA Factbook's website, it is the "birthplace of Islam and home to Islam's two holiest shrines in Mecca and Medina"[2]. Even though most of Saudi Arabia took a long time to be settled due to the inhospitable climate [3], Saudi Arabia was founded as a state in 1744 [1]. Saudi Arabia is bordered by the Red Sea[1], so along these areas agriculture is possible[1]. According to the U.S. Department of State website[3], "oil accounts for...about 75% of government revenues" and the CIA Factbook also states that Saudi Arabia has an economy heavily dependent on oil[2]. Government in Saudi Arabia is heavily based upon Islam, because the constitution follows Islamic law[2].
Sources:
[1] http://www.everyculture.com/Sa-Th/Saudi-Arabia.html Visited 4/3/12 at 7:42 P.M.
[2]  https://www.cia.gov/library/publications/the-world-factbook/geos/sa.html Visited 4/3/12 at 7:43 P.M.
[3] http://www.state.gov/r/pa/ei/bgn/3584.htm Visted 4/3/12 at 7:45 P.M.

Improvement needed: Count all quotes from first to last and use ibid. to denote previously used sources.

      Saudi Arabia is a large country that covers most of the Arabian peninsula [1] and according to the CIA Factbook's website, it is the "birthplace of Islam and home to Islam's two holiest shrines in Mecca and Medina"[2]. Even though most of Saudi Arabia took a long time to be settled due to the inhospitable climate [3], Saudi Arabia was founded as a state in 1744 [not needed because of the next one]. Saudi Arabia is bordered by the Red Sea[not needed because of the next one], so along these areas agriculture is possible[4]. According to the U.S. Department of State website[5], "oil accounts for...about 75% of government revenues" and the CIA Factbook also states that Saudi Arabia has an economy heavily dependent on oil[6]. Government in Saudi Arabia is heavily based upon Islam, because the constitution follows Islamic law[7].

(1) http://www.everyculture.com/Sa-Th/Saudi-Arabia.html Visited 4/3/12 at 7:42 P.M.
(2)  https://www.cia.gov/library/publications/the-world-factbook/geos/sa.html Visited 4/3/12 at 7:43 P.M.
(3) http://www.state.gov/r/pa/ei/bgn/3584.htm Visted 4/3/12 at 7:45 P.M.

(4) ibid. (1) http://www.everyculture.com/Sa-Th/Saudi-Arabia.html 

(5) ibid. (3) http://www.state.gov/r/pa/ei/bgn/3584.htm 

(6) ibid. (2) https://www.cia.gov/library/publications/the-world-factbook/geos/sa.html 

(7) ibid. (3) http://www.state.gov/r/pa/ei/bgn/3584.htm 

The meaning and use of the term ibid. is sufficiently discussed by the Wikipedia enxyclopedia: "Ibid. (Latin, short for ibidem, meaning the same place) is the term used to provide an endnote or footnote citation or reference for a source that was cited in the preceding endnote or footnote. It is similar in meaning to idem (meaning something that has been mentioned previously; the same), abbreviated Id., which is commonly used in legal citation.^[1] To find the ibid. source, one must look at the reference preceding it." (1)

(1) http://en.wikipedia.org/wiki/Ibid. visited April 10, 2012