# ^ Pendergrast, Mark (April 2009). "Coffee second only to oil?". Tea & Coffee Trade Journal. http://www.entrepreneur.com/tradejournals/article/198849799_1.html. Retrieved December 29, 2009.
# ^ a b Villanueva, Cristina M; Cantor, Kenneth P; King, Will D; Jaakkola, Jouni JK; Cordier, Sylvaine; Lynch, Charles F; Porru, Stefano; Kogevinas, Manolis (2006). "Total and specific fluid consumption as determinants of bladder cancer risk". International Journal of Cancer 118 (8): 2040–47. doi:10.1002/ijc.21587. PMID 16284957.
# ^ a b c d e f Weinberg & Bealer 2001, pp. 3–4
# ^ a b c Meyers, Hannah (March 7, 2005). "Suave Molecules of Mocha—Coffee, Chemistry, and Civilization". New Partisan. New Partisan. http://www.newpartisan.com/home/suave-molecules-of-mocha-coffee-chemistry-and-civilization.html. Retrieved February 3, 2007.
# ^ Pankhurst, Richard (1968). Economic History of Ethiopia. Addis Ababa: Haile Selassie I University. p. 198.
# ^ a b Hopkins, Kate (March 24, 2006). "Food Stories: The Sultan's Coffee Prohibition". Accidental Hedonist. http://www.accidentalhedonist.com/index.php/2006/03/24/food_stories_the_sultan_s_coffee_prohibi. Retrieved January 3, 2010.
# ^ "FAO Statistical Yearbook 2004 Vol. 1/1 Table C.10: Most important imports and exports of agricultural products (in value terms) (2004)" (PDF). FAO Statistics Division. 2006. Archived from the original on 2008-06-25. http://web.archive.org/web/20080625174054/http://www.fao.org/statistics/yearbook/vol_1_1/pdf/c10.pdf. Retrieved September 13, 2007.
# ^ "FAOSTAT Core Trade Data (commodities/years)". FAO Statistics Division. 2007. Archived from the original on October 14, 2007. http://web.archive.org/web/20071014183239/http://faostat.fao.org/site/343/DesktopDefault.aspx?PageID=343. Retrieved October 24, 2007. To retrieve export values: Select the "commodities/years" tab. Under "subject", select "Export value of primary commodity." Under "country," select "World." Under "commodity," hold down the shift key while selecting all commodities under the "single commodity" category. Select the desired year and click "show data." A list of all commodities and their export values will be displayed. 