Birkhoff, G. (1970). Algebra moderna (4a. ed.). Vicens-Vives.
Tohutoru Kātū Chicago (17th ed.)Birkhoff, Garrett. Algebra Moderna. 4a. ed. Barcelona: Vicens-Vives, 1970.
Tohutoro MLA (9th ed.)Birkhoff, Garrett. Algebra Moderna. 4a. ed. Vicens-Vives, 1970.
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