APA (7th ed.) Citation

Bough, L. S. (1994). How to write first-class letters: The handbook for practical letter writing. NTC Publishing Group.

Chicago Style (17th ed.) Citation

Bough, L. Sue. How to Write First-class Letters: The Handbook for Practical Letter Writing. Lincolnwood, Ill.: NTC Publishing Group, 1994.

MLA (9th ed.) Citation

Bough, L. Sue. How to Write First-class Letters: The Handbook for Practical Letter Writing. NTC Publishing Group, 1994.