Fleming, W., & Varberg, D. E. (1988). Precalculus mathematics ; plane trigonometry: A problem-solving approach (2nd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Fleming, Walter, agus Dale E. Varberg. Precalculus Mathematics ; Plane Trigonometry: A Problem-solving Approach. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1988.
Lua MLA (9ú heag.)Fleming, Walter, agus Dale E. Varberg. Precalculus Mathematics ; Plane Trigonometry: A Problem-solving Approach. 2nd ed. Prentice Hall, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.