Dyfyniad APA

Michael Allaby. (2000). Basics of environmental science (2nd.). Routledge.

Dyfyniad Arddull Chicago

Michael Allaby. Basics of Environmental Science. 2nd. London: Routledge, 2000.

Dyfyniad MLA

Michael Allaby. Basics of Environmental Science. 2nd. Routledge, 2000.

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