+
References
Albrigo,L.G.,& Davies,F.S. (1998). Citrus. Cambridge: CAB International.
Cobley, L.S., (1976). An Introduction to the Botany of Tropical Crops (2nd ed.). New York,NY: Longman Inc.
Dugo, G., & Di Giacomo, A. (2002). Citrus: The Genus Citrus. New York, NY: Taylor and Francis Group.
Laszzlo, P. (2007). Citrus. Chicago, IL: The University of Chicago Press.
Lemon, The. (2011).
http://www.fillmorepirucitrus.com/Lemon_Facts.htm.
Accessed 19 April 2012.
Lemons: Citrus limon (2012).
http://www.hort.purdue.edu/newcrop/morton/
lemon.html
Margen, S M.D. (1992). The Wellness Encyclopedia of Food and Nutrition: How to Buy, Store, and Prepare Every Variety of Fresh Food. New York, NY: Random House.
Obreza, T.A. & Zekri, M. Plant Nutrients for Citrus Trees. http://www. fillmorepirucitrus.com/Lemon_Facts.htm. Accessed 19 April 2012.
Rinzler, C.A., (2009). The New Complete Book of Food: A Nutritional, Medical and Culinary Guide. New York, NY: Checkmark Publishing.