Andrew Jenson, "Haag, Adolph," Latter-day Saint Biographical Encyclopedia
First Presidency missionary calls and recommendations, 1877-1918, Church History Library
Gustave A. L. Haag mission journals, 1892 February-September, Church History Library
J.H.A., "A Missionary Dead," The Latter-day Saints' Millennial Star 54, no. 41
Larry W. Draper and Kent P. Jackson, editors, A Missionary Story: The Letters and Journals of Adolf Haag, Mormon Missionary to Switzerland and Palestine, 1892, Provo, Utah: Religious Studies Center, Brigham Young University, 2015
Missionary Department missionary registers, 1860-1959
Missionary Department missionary registers, 1860-1959
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