Παραπομπή APA

Alfonsin, J. L. R. e. (2001). Perfect Graphs. John Wiley & sons, ltd.

Παραπομπή Chicago Style

Alfonsin, Jorge L Ramirez ed. Perfect Graphs. England: John Wiley & sons, ltd, 2001.

Παραπομπή MLA

Alfonsin, Jorge L Ramirez ed. Perfect Graphs. John Wiley & sons, ltd, 2001.