Dyfyniad APA

Purvis,Martin, & Grainger,Alan. (2005). Exploring sustainable development: Geographical perspectives. Earthscan.

Dyfyniad Arddull Chicago

Purvis,Martin, and Grainger,Alan. Exploring Sustainable Development: Geographical Perspectives. London: Earthscan, 2005.

Dyfyniad MLA

Purvis,Martin, and Grainger,Alan. Exploring Sustainable Development: Geographical Perspectives. Earthscan, 2005.

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