Lua APA (7ú heag.)

Linton, I. (1997). 30 minutes - to write sales letters. Kogan Page.

Lua i Stíl Chicago (17ú heag.)

Linton, Ian. 30 Minutes - to Write Sales Letters. New Delhi: Kogan Page, 1997.

Lua MLA (8ú heag.)

Linton, Ian. 30 Minutes - to Write Sales Letters. Kogan Page, 1997.

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