McGraw-HIll., 2003
Buku Teks
edited by Simen Andersen Øyen, Tone Lund-Olsen and Nora Sørensen Vaage
Wageningen Academic, 2012
eBooks
Pomeroy, John H.
Holt, Rinehart and Winston, 1964
Buku Teks SO
Moore, D. (David), 1942-
Cambridge University Press, 2013
Buku Teks
Needham, Joseph
Cambridge University Press, 1971
Buku Teks SO