توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Krone, W. M. (1985). The relationship of participation levels in extra-curriculur activities and outcomes of discipline and academic achievements. State University of New York.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Krone, William Mark. The Relationship of Participation Levels in Extra-curriculur Activities and Outcomes of Discipline and Academic Achievements. Buffalo, N.Y.: State University of New York, 1985.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Krone, William Mark. The Relationship of Participation Levels in Extra-curriculur Activities and Outcomes of Discipline and Academic Achievements. State University of New York, 1985.