APA (7th ed.) Citation

Kleffe, H. (1961). Energie der Zukunft. Kinderbuchverlag.

Chicago Style (17th ed.) Citation

Kleffe, Hans. Energie Der Zukunft. Berlin: Kinderbuchverlag, 1961.

MLA (8th ed.) Citation

Kleffe, Hans. Energie Der Zukunft. Kinderbuchverlag, 1961.

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