توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Hasskarl, G. C. H. (1914). Modern problems of the home, school, and church: Solved by Christian pedagogy and sociology (2d ed. enl.). On sale at General Council Pub. House.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Hasskarl, Gottlieb Christopher Henry. Modern Problems of the Home, School, and Church: Solved by Christian Pedagogy and Sociology. 2d ed. enl. Philadelphia, Pa.: On sale at General Council Pub. House, 1914.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Hasskarl, Gottlieb Christopher Henry. Modern Problems of the Home, School, and Church: Solved by Christian Pedagogy and Sociology. 2d ed. enl. On sale at General Council Pub. House, 1914.