APA (7th ed.) Citation

Veith, H., Wisniewsky, G. K., & Burk, G. H. (1970). Wärmepumpen. Müller.

Chicago Style (17th ed.) Citation

Veith, Heinz, Günter K. Wisniewsky, and George H. Burk. Wärmepumpen. Karlsruhe: Müller, 1970.

MLA (9th ed.) Citation

Veith, Heinz, et al. Wärmepumpen. Müller, 1970.