Παραπομπή APA

Crapo, H. H., & Rota, G. (1970). On the foundations of combinatorial theory: Combinatorial geometries (Prelim. ed.). M.I.T. Press.

Παραπομπή Chicago Style

Crapo, Henry H., και Gian-Carlo Rota. On the Foundations of Combinatorial Theory: Combinatorial Geometries. Prelim. ed. Cambridge, Mass.: M.I.T. Press, 1970.

Παραπομπή MLA

Crapo, Henry H., και Gian-Carlo Rota. On the Foundations of Combinatorial Theory: Combinatorial Geometries. Prelim. ed. M.I.T. Press, 1970.