Citazione APA

Cohen, L., & Ehrlich, G. Structure of the real number system. Van Nostrand reinhold company.

Stile di citazione Chicago

Cohen, Leon, e Gertrude Ehrlich. Structure of the Real Number System. New York: Van Nostrand reinhold company.

Citazione MLA

Cohen, Leon, e Gertrude Ehrlich. Structure of the Real Number System. Van Nostrand reinhold company.