Dyfyniad APA

Sitter, C. L., Gosling, M., & Gray, C. (2007). Learn reference work (1st North American ed.). TotalRecall Publications, Inc..

Dyfyniad Arddull Chicago

Sitter, Clara Loewen, Mary Gosling, and Colin Gray. Learn Reference Work. 1st North American ed. Friendswood, Tex.: TotalRecall Publications, Inc., 2007.

Dyfyniad MLA

Sitter, Clara Loewen, et al. Learn Reference Work. 1st North American ed. TotalRecall Publications, Inc., 2007.

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