Dyfyniad APA

(1987). Environmental protection: Problems , policy administration , law. Deep and Deep.

Dyfyniad Arddull Chicago

Environmental Protection: Problems , Policy Administration , Law. New Delhi: Deep and Deep, 1987.

Dyfyniad MLA

Environmental Protection: Problems , Policy Administration , Law. Deep and Deep, 1987.

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