Cita APA (7a ed.)

Smart, W. K. (1916). How to write business letters. A.W. Shaw Co..

Cita Chicago Style (17a ed.)

Smart, Walter Kay. How to Write Business Letters. New York : Chicago [etc.]: A.W. Shaw Co., 1916.

Cita MLA (8a ed.)

Smart, Walter Kay. How to Write Business Letters. A.W. Shaw Co., 1916.