DUPREE, H. D. E. (1966). MODERN COLLEGE TRIGONOMETRY. Dickenson Publishing Company.
Chicago Style (17th ed.) CitationDUPREE, HARMON DANIEL E. MODERN COLLEGE TRIGONOMETRY. Dickenson Publishing Company, 1966.
MLA引文DUPREE, HARMON DANIEL E. MODERN COLLEGE TRIGONOMETRY. Dickenson Publishing Company, 1966.
警告：这些引文格式不一定是100％准确.