Cita APA

Adamek, J., Herrlich, H., & Strecker, G. (1990). Abstract and concrete categories. John Wiley.

Citación estilo Chicago

Adamek, Jiri, Horst Herrlich, y George Strecker. Abstract and Concrete Categories. New York: John Wiley, 1990.

Cita MLA

Adamek, Jiri, et al. Abstract and Concrete Categories. John Wiley, 1990.