Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Ahlswede, Rudolf, y Ingo Wegener. Search Problems. Chichester [etc.]: John Wiley & Sons, 1987.

Cita MLA (9a ed.)

Ahlswede, Rudolf, y Ingo Wegener. Search Problems. John Wiley & Sons, 1987.