Dyfyniad APA

Maathai, W. (2006). Green belt movement. Harvard Business School Press.

Dyfyniad Arddull Chicago

Maathai, Wangari. Green Belt Movement. Boston: Harvard Business School Press, 2006.

Dyfyniad MLA

Maathai, Wangari. Green Belt Movement. Harvard Business School Press, 2006.

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