Cita APA (7a ed.)

(1931). Autograph leters and historical documents. Maggs Bross.

Cita Chicago Style (17a ed.)

Autograph Leters and Historical Documents. London: Maggs Bross, 1931.

Cita MLA (9a ed.)

Autograph Leters and Historical Documents. Maggs Bross, 1931.