Παραπομπή APA

Gruber,P.M.ed, Gruber,P.M, & Wills,J.M. (1993). Hand book of Convex geometry. North Holland.

Παραπομπή Chicago Style

Gruber,P.M.ed, Gruber,P.M, και Wills,J.M. Hand Book of Convex Geometry. New York: North Holland, 1993.

Παραπομπή MLA

Gruber,P.M.ed, et al. Hand Book of Convex Geometry. North Holland, 1993.