Kingsley, N. F. (1902). Four American explorers: Captain Meriwether Lewis, Captain William Clark, General John C. Frémont, Dr. Elisha K. Kane: A book for young Americans. Werner School Book Company.
Chicago-referens (17:e uppl.)Kingsley, Nellie F. Four American Explorers: Captain Meriwether Lewis, Captain William Clark, General John C. Frémont, Dr. Elisha K. Kane: A Book for Young Americans. New York, Chicago: Werner School Book Company, 1902.
MLA-referens (8:e uppl.)Kingsley, Nellie F. Four American Explorers: Captain Meriwether Lewis, Captain William Clark, General John C. Frémont, Dr. Elisha K. Kane: A Book for Young Americans. Werner School Book Company, 1902.
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