APA aipamena

Roque, C. R. (1990). Earth, water, air, fire: Essays on environmentalism. Kalikasan Press.

Chicago Style aipamena

Roque, Celso R. Earth, Water, Air, Fire: Essays on Environmentalism. Manila: Kalikasan Press, 1990.

MLA aipamena

Roque, Celso R. Earth, Water, Air, Fire: Essays on Environmentalism. Kalikasan Press, 1990.