Gaya APA

Spiegel, M, R. (1971). Schaum s outline theory and problems of calculus of finite differences and difference equations. (1971). : New York : McGraw-Hill,.

Gaya MLA

Spiegel, Murray, R.. "Schaum s outline theory and problems of calculus of finite differences and difference equations.". 1971 : New York : McGraw-Hill,, 1971. Text.