Cita APA (7th ed.)

Heineman, E. R., & Tarwater, J. D. (1993). Plane Trigonometry (seventh edition.). McGraw-Hill, Inc.

Cita Chicago (17th ed.)

Heineman, E. Richard, i J. Dalton Tarwater. Plane Trigonometry. seventh edition. New York, EEUU: McGraw-Hill, Inc, 1993.

Cita MLA (9th ed.)

Heineman, E. Richard, i J. Dalton Tarwater. Plane Trigonometry. seventh edition. McGraw-Hill, Inc, 1993.