Gaya APA
Darman, S.
(2014).
Problematika Kesuburan Tanah
(
Cet.2)
.
Palu:
Untad Press.
Gaya MLA
Darman, Saiful.
"Problematika Kesuburan Tanah".
Cet.2
Palu:
Untad Press,
2014.
Textbook.