Gaya APA
Dahlberg, K, A. (1986).
New Directions for Agriculture and Agriculture Research (1).
United States of America:
Rowman & Allanheld.
Gaya MLA
Dahlberg, Kenneth, A..
"New Directions for Agriculture and Agriculture Research".
1
United States of America:
Rowman & Allanheld,
1986.
Textbook.