Gaya APA
Rankin, W., Croall, S.
(1991).
Mengenal Ekologi For Beginners
.
Jakarta:
Bitan Icon Books Ltd.
Gaya MLA
Rankin, William., Croall, Stephen.
"Mengenal Ekologi For Beginners".
Jakarta:
Bitan Icon Books Ltd,
1991.
Teks.