Cita APA (7a ed.)

O'Brien, J. C. (1867). Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867.

Cita Chicago Style (17a ed.)

O'Brien, John C. Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867. 1867.

Cita MLA (8a ed.)

O'Brien, John C. Note, To: "Dear Frank" From: J.C. O'Brien, January 12, 1867. 1867.