Dyfyniad APA

Bibby, C. J. (1992). Bird Census Techniques Collin J. Bibby, Neil D. Burges. Academic.

Dyfyniad Arddull Chicago

Bibby, Collin J. Bird Census Techniques Collin J. Bibby, Neil D. Burges. Academic, 1992.

Dyfyniad MLA

Bibby, Collin J. Bird Census Techniques Collin J. Bibby, Neil D. Burges. Academic, 1992.

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