Dyfyniad APA

ebrary, Inc, & Poli, R. (2010). Causality and motivation. Ontos Verlag.

Dyfyniad Arddull Chicago

ebrary, Inc, and Roberto Poli. Causality and Motivation. Frankfurt ; New Brunswick: Ontos Verlag, 2010.

Dyfyniad MLA

ebrary, Inc, and Roberto Poli. Causality and Motivation. Ontos Verlag, 2010.

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