Gaya APA
Opportunities for increasing crop yields. (1980).
Boston:
Pitman Advanced Publishing Program.
Gaya Chicago
Opportunities for increasing crop yields.
text.
Boston:
Pitman Advanced Publishing Program,
1980.
.
Gaya MLA
Opportunities for increasing crop yields.
text.
Boston:
Pitman Advanced Publishing Program,
1980.
.
Gaya Turabian
Opportunities for increasing crop yields.
Boston:
Pitman Advanced Publishing Program,
1980.
.