Timeline
|
|
Bibliography
- "Citric Acid” 1981. The World Book Encyclopedia, Vol. 4. U.S.A: World Book Inc., pp.447
- “pH’ 1981. The World Book Encyclopedia, Vol. 15. U.S.A: World Book Inc., pp.315
- Christy Flora. (No Date). Acidity Level of Citrus Fruits. http://www.ehow.com/facts_5635053_acidity-level-citrus-fruits.html (accessed 13 Mar. 2014)
- Ask. (No Date). What Does Alkaline Mean?. http://www.ask.com/question/what-does-alkaline-mean (accessed 14 Mar. 2014)
- Ask. (No Date). PH of Citrus Fruits?. http://www.ask.com/question/ph-of-citrus-fruits (accessed 14 Mar. 2014)