Davis, H. A. a. C. (1933). Brief course in plane and sperical trigonometry. American Book.
Citace podle Chicago (17th ed.)Davis, H. A. and Chambers. Brief Course in Plane and Sperical Trigonometry. New ork: American Book, 1933.
Citace podle MLA (9th ed.)Davis, H. A. and Chambers. Brief Course in Plane and Sperical Trigonometry. American Book, 1933.
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