Gaya APA

Ayres, F, J. (1954). Schaum s outline of theory and problems of plane and spherical trigonometry. (1954). : New York : McGraw-Hill,.

Gaya MLA

Ayres, Frank,, Jr.. "Schaum s outline of theory and problems of plane and spherical trigonometry.". 1954 : New York : McGraw-Hill,, 1954. Text.