APA (7th ed.) Citation

(2005). Business Correspondence, Vol. 1: How to Write a Business Letter. Project Gutenberg.

Chicago Style (17th ed.) Citation

Business Correspondence, Vol. 1: How to Write a Business Letter. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Business Correspondence, Vol. 1: How to Write a Business Letter. Project Gutenberg, 2005.

Warning: These citations may not always be 100% accurate.