APA (7th ed.) Citation

Feustel, G., & Proft, I. u. H. (1975). Jonathan (o.A.). Altberliner Verlag Lucie Groszer.

Chicago Style (17th ed.) Citation

Feustel, Günther, and Irmhild und Hilmar Proft. Jonathan. o.A. Berlin: Altberliner Verlag Lucie Groszer, 1975.

MLA (8th ed.) Citation

Feustel, Günther, and Irmhild und Hilmar Proft. Jonathan. o.A. Altberliner Verlag Lucie Groszer, 1975.

Warning: These citations may not always be 100% accurate.