Cita APA (7th ed.)

(1994). Economy and ecology in sustainable development. Gramedia Pustaka Utama.

Cita Chicago (17th ed.)

Economy and Ecology in Sustainable Development. Jakarta: Gramedia Pustaka Utama, 1994.

Cita MLA (9th ed.)

Economy and Ecology in Sustainable Development. Gramedia Pustaka Utama, 1994.