Cita APA (7a ed.)

Griffin, M. I. J., & Glennan, M. (1889). Letter, To: "Dear Sir and Brother", From: Martin I. J. Griffin, Secretary, I.C.B.U., June [2], 1889.

Cita Chicago Style (17a ed.)

Griffin, Martin I. J., y Michael Glennan. Letter, To: "Dear Sir and Brother", From: Martin I. J. Griffin, Secretary, I.C.B.U., June [2], 1889. 1889.

Cita MLA (8a ed.)

Griffin, Martin I. J., y Michael Glennan. Letter, To: "Dear Sir and Brother", From: Martin I. J. Griffin, Secretary, I.C.B.U., June [2], 1889. 1889.