APA (7th ed.) Citation

Kleffe, H. (1975). Energie - Kraftquell der Natur. Kinderbuchverlag.

Chicago Style (17th ed.) Citation

Kleffe, Hans. Energie - Kraftquell Der Natur. Berlin: Kinderbuchverlag, 1975.

MLA (8th ed.) Citation

Kleffe, Hans. Energie - Kraftquell Der Natur. Kinderbuchverlag, 1975.

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