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Lua i Stíl Chicago (17ú heag.)Spitzbart, Abraham. Plane Trigonometry.
Lua MLA (9ú heag.)Spitzbart, Abraham. Plane Trigonometry.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)