Loney, S. (1963). Plane trigonometry (6th.). Macmillan & Co. Ltd.
Lua i Stíl Chicago (17ú heag.)Loney, S. Plane Trigonometry. 6th. London: Macmillan & Co. Ltd, 1963.
Lua MLA (9ú heag.)Loney, S. Plane Trigonometry. 6th. Macmillan & Co. Ltd, 1963.
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