Παραπομπή APA

Johnson, F. (2011). Syzygies and homotopy theory. Springer.

Παραπομπή Chicago Style

Johnson, F.E.A. Syzygies and Homotopy Theory. New York: Springer, 2011.

Παραπομπή MLA

Johnson, F.E.A. Syzygies and Homotopy Theory. Springer, 2011.