Dyfyniad APA

Arnett, R. H. (1998). The Naturalists' directory and almanac, international. World Natural History Publications.

Dyfyniad Arddull Chicago

Arnett, Ross H. The Naturalists' Directory and Almanac, International. Kinderhook, N.Y. [etc.]: World Natural History Publications, 1998.

Dyfyniad MLA

Arnett, Ross H. The Naturalists' Directory and Almanac, International. World Natural History Publications, 1998.

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