Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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