Walsh, J. J. (1904). Audubon, the Naturalist. Records of the American Catholic Historical Society of Philadelphia. Volume XV. Pages 8-21. Philadelphia : American Catholic Historical Society of Philadelphia.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWalsh, James J. Audubon, the Naturalist. Records of the American Catholic Historical Society of Philadelphia. Volume XV. Pages 8-21. Philadelphia : American Catholic Historical Society of Philadelphia, 1904.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিWalsh, James J. Audubon, the Naturalist. Records of the American Catholic Historical Society of Philadelphia. Volume XV. Pages 8-21. Philadelphia : American Catholic Historical Society of Philadelphia, 1904.
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