APA način citiranja

Adamek, J., Herrlich, H., & Strecker, G. E. (1990). Abstract and concrete categories: The joy of cats.

Čikaški stil citiranja

Adamek, Jiri, Horst Herrlich, i George E. Strecker. Abstract and Concrete Categories: The Joy of Cats. New York, Wiley and Sons, 1990.

MLA način citiranja

Adamek, Jiri, et al. Abstract and Concrete Categories: The Joy of Cats. 1990.