Gaya APA
Principles of Ecology in Plant Production. (1998).
New York:
Cab Internasional.
Gaya Chicago
Principles of Ecology in Plant Production.
.
New York:
Cab Internasional,
1998.
Buku.
Gaya MLA
Principles of Ecology in Plant Production.
.
New York:
Cab Internasional,
1998.
Buku.
Gaya Turabian
Principles of Ecology in Plant Production.
New York:
Cab Internasional,
1998.
Buku.