Middleton, T. C. (1907). State of Geographical Knowledge at the Time of the Discovery of America, A.D. 1492. Delaware Co., Pa..
Čikaški stil citiranja (17. izdanje)Middleton, Thomas C. State of Geographical Knowledge at the Time of the Discovery of America, A.D. 1492. Delaware Co., Pa., 1907.
MLA način citiranja (8. izdanje)Middleton, Thomas C. State of Geographical Knowledge at the Time of the Discovery of America, A.D. 1492. Delaware Co., Pa., 1907.
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