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.
Citace podle Chicago (17th ed.)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.
Citace podle MLA (8th ed.)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.
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