APA (7th ed.) Citation

Ahlswede, R., & Wegener, I. (1987). Search problems. Wiley.

Chicago Style (17th ed.) Citation

Ahlswede, Rudolf, and Ingo Wegener. Search Problems. Chichester [West Sussex] ; New York: Wiley, 1987.

MLA (9th ed.) Citation

Ahlswede, Rudolf, and Ingo Wegener. Search Problems. Wiley, 1987.