ebrary, Inc, & Hopkins, B. (2009). Resources for teaching discrete mathematics: Classroom projects, history modules, and articles. Mathematical Association of America.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, و Brian Hopkins. Resources for Teaching Discrete Mathematics: Classroom Projects, History Modules, and Articles. Washington, D.C.: Mathematical Association of America, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, و Brian Hopkins. Resources for Teaching Discrete Mathematics: Classroom Projects, History Modules, and Articles. Mathematical Association of America, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.