Dyfyniad APA

(1998). The encyclopedia of ecology & environmental management. Malden, MA, USA: Blackwell Science.

Dyfyniad Arddull Chicago

The Encyclopedia of Ecology & Environmental Management. Malden, MA, USA: Blackwell Science, 1998.

Dyfyniad MLA

The Encyclopedia of Ecology & Environmental Management. Malden, MA, USA: Blackwell Science, 1998.

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