Gaya APA

MOYER, R, E., AYERS, F. (2009). Schaum's outlines of trigonometry, fourth edition (Fiurth edition). New York: McGraw Hill.

Gaya MLA

MOYER, Robert, E.., AYERS, Frank. "Schaum's outlines of trigonometry, fourth edition". Fiurth edition New York: McGraw Hill, 2009. Text.