APA (7th ed.) Citation

Clark, T. A. (1921). When you write a letter: Some suggestions as to why, when, and how it should be done. B.H. Sanborn & Co.

Chicago Style (17th ed.) Citation

Clark, Thomas Arkle. When You Write a Letter: Some Suggestions as to Why, When, and How It Should Be Done. Chicago: B.H. Sanborn & Co, 1921.

MLA (9th ed.) Citation

Clark, Thomas Arkle. When You Write a Letter: Some Suggestions as to Why, When, and How It Should Be Done. B.H. Sanborn & Co, 1921.