O'Brien, J. C. (1867). Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867.
Čikaški stil citiranja (17. izdanje)O'Brien, John C. Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867. 1867.
MLA način citiranja (8. izdanje)O'Brien, John C. Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867. 1867.
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