Pennsylvania State College. Dept. of Mining Engineering. (1894). The Mining bulletin. Dept. of Mining Engineering, Pennsylvania State College.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pennsylvania State College. Dept. of Mining Engineering. The Mining Bulletin. [State College]: Dept. of Mining Engineering, Pennsylvania State College, 1894.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pennsylvania State College. Dept. of Mining Engineering. The Mining Bulletin. Dept. of Mining Engineering, Pennsylvania State College, 1894.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.