Cita APA (7th ed.)
Hardy, F. L. (1971). Precalculus Mathematics (2a ed.). Charles E. Merrill Publishing.
Cita Chicago (17th ed.)
Hardy, F. Lane. Precalculus Mathematics. 2a ed. Columbus: Charles E. Merrill Publishing, 1971.
Cita MLA (9th ed.)
Hardy, F. Lane. Precalculus Mathematics. 2a ed. Charles E. Merrill Publishing, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.