MLA
Rogers, H. Taylor. Greetings from Asheville, N.C. : In the Land of the Sky ; Blondin Donkey ; The Cabin on the Mountain Side ; Mountain Team. 1912. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/4644qrfj95-cor.
APA, 6th edition
Rogers, H. T. (1912). Greetings from Asheville, N.C. : In the land of the sky ; Blondin donkey ; The cabin on the mountain side ; Mountain team (Box 75) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfj95-cor.
Chicago
Rogers, H. Taylor. “Greetings from Asheville, N.C. : In the Land of the Sky ; Blondin Donkey ; The Cabin on the Mountain Side ; Mountain Team.” Postcards. Robert Langmuir African American Photograph Collection, 1912. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfj95-cor.