Lua APA (7ú heag.)

Ober, S. (1998). Contemporary business communication (3rd ed.). Houghton Mifflin Co.

Lua i Stíl Chicago (17ú heag.)

Ober, Scot. Contemporary Business Communication. 3rd ed. Boston: Houghton Mifflin Co, 1998.

Lua MLA (9ú heag.)

Ober, Scot. Contemporary Business Communication. 3rd ed. Houghton Mifflin Co, 1998.

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