Heineman, E. R., & Tarwater, J. D. (1993). Plane Trigonometry (seventh edition.). McGraw-Hill, Inc.
Chicago-čujuhus (17. p.)Heineman, E. Richard, juo J. Dalton Tarwater. Plane Trigonometry. seventh edition. New York, EEUU: McGraw-Hill, Inc, 1993.
MLA-čujuhus (9. p.)Heineman, E. Richard, juo J. Dalton Tarwater. Plane Trigonometry. seventh edition. McGraw-Hill, Inc, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.