APA Edition Citation

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

Chicago Edition Citation

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

MLA Edition Citation

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