Παραπομπή σε μορφή APA (7η εκδ.)

Ascher, W., & Healy, R. (1990). Natural resource policymaking in developing countries: Environment, economic growth and income distribution. Duke University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ascher, William, και Robert Healy. Natural Resource Policymaking in Developing Countries: Environment, Economic Growth and Income Distribution. Durham; London: Duke University Press, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ascher, William, και Robert Healy. Natural Resource Policymaking in Developing Countries: Environment, Economic Growth and Income Distribution. Duke University Press, 1990.