BITTINGER, M. L. (1989). College Algebra Marwin L. Bettinger, Judith A. Beecher. Addison Wesley.
Lua i Stíl Chicago (17ú heag.)BITTINGER, Marwin L. College Algebra Marwin L. Bettinger, Judith A. Beecher. Addison Wesley, 1989.
Lua MLA (8ú heag.)BITTINGER, Marwin L. College Algebra Marwin L. Bettinger, Judith A. Beecher. Addison Wesley, 1989.
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