Gaya APA
Hughes, H., D., Metcalfe, D., S. (1972).
Crop Production, Third Edition (Third Edition).
New York. USA:
Macmillan Publishing.
Gaya MLA
Hughes, H., D., Metcalfe, D., S..
Crop Production, Third Edition.
Third Edition
New York. USA:
Macmillan Publishing,
1972.
Text.