Herren, Ray V.
The science of agriculture : a biological approach
Delmar Cengage Learning, 2012
 Buku Teks
Leger, Daniel W.
Biological foundations of behavior : an integrative approach
HarperCollins, 1992
 Buku Teks
Goodman, Arthur
"Precalculus: understanding fuctions, a graphing approach
Grove Brooks/Cole, 2000
 Buku Teks SO
Bodenheimer, Thomas S.
Understanding health policy : a clinical approach
Appleton & Lange, 1995
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Eadie, Edward N., autohr
Understanding animal welfare: an integrated approach
[, Springer], 2012
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