APA (7th ed.) Citation

Weber, F., Kenda, G., & Irmtraud, T. (1952). "Stachelkugeln" in Opuntia ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Weber, Friedl, Griseldis Kenda, and Thaler Irmtraud. "Stachelkugeln" in Opuntia. [Sonderdr.]. 1952.

MLA (9th ed.) Citation

Weber, Friedl, et al. "Stachelkugeln" in Opuntia. [Sonderdr.]. 1952.