Gaya APA
Weisz, P, B., Keogh, R, N. (1982).
The science of biology (Edisi 5).
Amerika Serikat:
McGraw-Hill Book Company.
Gaya MLA
Weisz, Paul, B.., Keogh, Richard, N..
"The science of biology".
Edisi 5
Amerika Serikat:
McGraw-Hill Book Company,
1982.
Agribisnis.