APA (7th ed.) Citation

Heller, B. (1997). Manager's portfolio of hard to write business letters. Prentice Hall.

Chicago Style (17th ed.) Citation

Heller, Bernard. Manager's Portfolio of Hard to Write Business Letters. Paramus, N.J.: Prentice Hall, 1997.

MLA (9th ed.) Citation

Heller, Bernard. Manager's Portfolio of Hard to Write Business Letters. Prentice Hall, 1997.