Gaya APA
Jarvis, P, J.
(2000).
Ecological Principles and Environmental Issues
(
Ed. 1)
.
singpore:
Prentice Hall.
Gaya MLA
Jarvis, Peter, J.
"Ecological Principles and Environmental Issues".
Ed. 1
singpore:
Prentice Hall,
2000.
Buku PPS Pend. Biologi.