Cita APA (7a ed.)

O'Brien, J. C. (1870). Letter, To: "Dear Gallagher" From: J.C. O'Brien, April 1870.

Cita Chicago Style (17a ed.)

O'Brien, John C. Letter, To: "Dear Gallagher" From: J.C. O'Brien, April 1870. 1870.

Cita MLA (8a ed.)

O'Brien, John C. Letter, To: "Dear Gallagher" From: J.C. O'Brien, April 1870. 1870.