Παραπομπή APA

Herta A murphy. (1997). Effective business communications/7e (7th ed.). Mc Graw Hill.

Παραπομπή Chicago Style

Herta A murphy. Effective Business Communications/7e. 7th ed. New york: Mc Graw Hill, 1997.

Παραπομπή MLA

Herta A murphy. Effective Business Communications/7e. 7th ed. Mc Graw Hill, 1997.