Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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