Dyfyniad APA

Elliott, J. A. (1999). An Introduction to sustainable development (2nd ed.). Routledge.

Dyfyniad Arddull Chicago

Elliott, Jennifer A. An Introduction to Sustainable Development. 2nd ed. London ; New York: Routledge, 1999.

Dyfyniad MLA

Elliott, Jennifer A. An Introduction to Sustainable Development. 2nd ed. Routledge, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.