Dyfyniad APA

ebrary, Inc, & Melgaard, E. (2007). Needs. IOS Press.

Dyfyniad Arddull Chicago

ebrary, Inc, and Ebbe Melgaard. Needs. Amsterdam: IOS Press, 2007.

Dyfyniad MLA

ebrary, Inc, and Ebbe Melgaard. Needs. IOS Press, 2007.

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