APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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