Himstreet, W. C., & Baty, W. M. (1990). Business communications: Principles and methods (9th ed.). PWS-Kent.
Lua i Stíl Chicago (17ú heag.)Himstreet, William C., agus Wayne Murlin Baty. Business Communications: Principles and Methods. 9th ed. Boston: PWS-Kent, 1990.
Lua MLA (9ú heag.)Himstreet, William C., agus Wayne Murlin Baty. Business Communications: Principles and Methods. 9th ed. PWS-Kent, 1990.
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