APA-referens (7:e uppl.)

Shurter, R. L., & Nichols, F. G. (1948). Effective letters in business. McGraw-Hill Book Co.

Chicago-referens (17:e uppl.)

Shurter, Robert L., och Frederick George Nichols. Effective Letters in Business. New York: McGraw-Hill Book Co, 1948.

MLA-referens (8:e uppl.)

Shurter, Robert L., och Frederick George Nichols. Effective Letters in Business. McGraw-Hill Book Co, 1948.