Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Gutin, G., & Punnen, A. P. (2007). The Traveling Salesman Problem and Its Variations. Springer US : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Gregory Gutin, και Abraham P. Punnen. The Traveling Salesman Problem and Its Variations. Boston, MA: Springer US : Imprint: Springer, 2007.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. The Traveling Salesman Problem and Its Variations. Springer US : Imprint: Springer, 2007.