APA (7. basım) Alıntı

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

Chicago Style (17. basım) Atıf

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

MLA (8th ed.) Atıf

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