APA (7th ed.) Citation

DUREIL, C. (1930). Key to advanced trigonometry. G.Bell.

Chicago Style (17th ed.) Citation

DUREIL, C.V. Key to Advanced Trigonometry. London: G.Bell, 1930.

MLA (9th ed.) Citation

DUREIL, C.V. Key to Advanced Trigonometry. G.Bell, 1930.

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