Lua APA (7ú heag.)

BALDWIN, H. L. (1993). Essential Geometry. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

BALDWIN, Harry L. Essential Geometry. McGraw-Hill, 1993.

Lua MLA (8ú heag.)

BALDWIN, Harry L. Essential Geometry. McGraw-Hill, 1993.

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