Lindeburg M. R. Michael. (2006). Practice Problems for the Mechanical Engineering PE Exam: A Companion to the Mechanical Engineering Reference Manual (12th ed.). Belmont, Professional Publications, 2006.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lindeburg M. R. Michael. Practice Problems for the Mechanical Engineering PE Exam: A Companion to the Mechanical Engineering Reference Manual. 12th ed. Belmont, Professional Publications, 2006, 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Lindeburg M. R. Michael. Practice Problems for the Mechanical Engineering PE Exam: A Companion to the Mechanical Engineering Reference Manual. 12th ed. Belmont, Professional Publications, 2006, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.