Cita APA (7th ed.)

Haffmans, G. (1993). Kleiner Atheismus-Katechismus. Haffmans.

Cita Chicago (17th ed.)

Haffmans, Gerd. Kleiner Atheismus-Katechismus. Zürich: Haffmans, 1993.

Cita MLA (8th ed.)

Haffmans, Gerd. Kleiner Atheismus-Katechismus. Haffmans, 1993.