APA (7th ed.) Citation

Buhlig, R. (2011). Business English A Practice Book. Project Gutenberg.

Chicago Style (17th ed.) Citation

Buhlig, Rose. Business English A Practice Book. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Buhlig, Rose. Business English A Practice Book. Project Gutenberg, 2011.

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