Linton, I. (1997). 30 minutes - to write sales letters. Kogan Page.
Citación estilo ChicagoLinton, Ian. 30 Minutes - to Write Sales Letters. New Delhi: Kogan Page, 1997.
Cita MLALinton, Ian. 30 Minutes - to Write Sales Letters. Kogan Page, 1997.
Warning: These citations may not always be 100% accurate.