APA Style
Usman Nasution, Ir.. (1989).
Buletin Pertanian Volume 8 Nomor 1 April 1989 (1).
Medan:
Fakultas Pertanian UISU.
Chicago Style
Usman Nasution, Ir..
Buletin Pertanian Volume 8 Nomor 1 April 1989.
1
Medan:
Fakultas Pertanian UISU,
1989.
Hard Copy.
MLA Style
Usman Nasution, Ir..
Buletin Pertanian Volume 8 Nomor 1 April 1989.
1
Medan:
Fakultas Pertanian UISU,
1989.
Hard Copy.
Turabian Style
Usman Nasution, Ir..
Buletin Pertanian Volume 8 Nomor 1 April 1989.
1
Medan:
Fakultas Pertanian UISU,
1989.
Hard Copy.