Citazione APA

Gellert, W., & Gellert, W. (1977). VNR concise encyclopedia of mathematics (1st American ed.). Van Nostrand Reinhold Co..

Stile di citazione Chicago

Gellert, W.ed, e Walter Gellert. VNR Concise Encyclopedia of Mathematics. 1st American ed. New York: Van Nostrand Reinhold Co., 1977.

Citazione MLA

Gellert, W.ed, e Walter Gellert. VNR Concise Encyclopedia of Mathematics. 1st American ed. Van Nostrand Reinhold Co., 1977.