I used the following sources for editing the Wikipedia article Tea in March 2008:
Mondal, T.K. (2007), "Tea", in Pua, E.C.; Davey, M.R. (eds.), Biotechnology in Agriculture and Forestry, vol. 60: Transgenic Crops V, Berlin: Springer, pp. 519–535, ISBNISBN-13 978-3-540-49160-6{{citation}}: Check |isbn= value: invalid character (help).
Kiple, Kenneth F. (October 2000). The Cambridge World History of Food (Volume 1). Cambridge University Press. ISBN0521402166. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
