Gaya APA
DELORIT, R, J., GREUB, L, J.
(1974).
Crop production
.
Englewood Cliffs:
Prentice-Hall.
Gaya MLA
DELORIT, Richard, J.., GREUB, Louis, J..
"Crop production".
Englewood Cliffs:
Prentice-Hall,
1974.
Buku.