APA (7. basım) Alıntı

Klaus, G. (1968). Was ist - was soll. Urania-Verlag.

Chicago Style (17. basım) Atıf

Klaus, Georg. Was Ist - Was Soll. Leipzig: Urania-Verlag, 1968.

MLA (8th ed.) Atıf

Klaus, Georg. Was Ist - Was Soll. Urania-Verlag, 1968.