Gaya APA

Ayres, F. (1990). Schaum's outline of theory and problems of trigonometry : with calculator-based solutions (2nd ed). New York: McGraw-Hill.

Gaya MLA

Ayres, Frank. "Schaum's outline of theory and problems of trigonometry : with calculator-based solutions". 2nd ed New York: McGraw-Hill, 1990. Text.