Dyfyniad APA

Lopker, J. (2000). Pictures of personality: Guide to the four human natures (First edition.). Typology.

Dyfyniad Arddull Chicago

Lopker, John. Pictures of Personality: Guide to the Four Human Natures. First edition. Los Angeles, CA: Typology, 2000.

Dyfyniad MLA

Lopker, John. Pictures of Personality: Guide to the Four Human Natures. First edition. Typology, 2000.

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