Calkins, H. L. (1960). Master preachers: Their study and devotional habits. Review and Herald.
Citace podle Chicago (17th ed.)Calkins, Harold L. Master Preachers: Their Study and Devotional Habits. Washington, D.C: Review and Herald, 1960.
Citace podle MLA (9th ed.)Calkins, Harold L. Master Preachers: Their Study and Devotional Habits. Review and Herald, 1960.
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