Gaya APA

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

Gaya MLA

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