Butler, T. R., & Cooper, F. (1900). Unpublished letters. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 215-220. Philadelphia : American Catholic Historical Society of Philadelphia.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিButler, T. R., এবং Francis Cooper. Unpublished Letters. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 215-220. Philadelphia : American Catholic Historical Society of Philadelphia, 1900.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিButler, T. R., এবং Francis Cooper. Unpublished Letters. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 215-220. Philadelphia : American Catholic Historical Society of Philadelphia, 1900.
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