Gaya APA
Krebs, Charles J.. (1988).
The Message of Ecology .
New York:
Harper Collins Publishers.
Gaya Chicago
Krebs, Charles J..
The Message of Ecology.
New York:
Harper Collins Publishers,
1988.
Teks.
Gaya MLA
Krebs, Charles J..
The Message of Ecology.
New York:
Harper Collins Publishers,
1988.
Teks.
Gaya Turabian
Krebs, Charles J..
The Message of Ecology.
New York:
Harper Collins Publishers,
1988.
Teks.