Gehrmann, J., & Lester, T. (1984). Trigonometry. Harcourt Brace Jovanovich.
Chicagoスタイル(17版)引用形式Gehrmann, James, , Thomas Lester. Trigonometry. San Diego: Harcourt Brace Jovanovich, 1984.
MLA(9版)引用形式Gehrmann, James, , Thomas Lester. Trigonometry. Harcourt Brace Jovanovich, 1984.
警告: この引用は必ずしも正確ではありません.