APA aipamena

Richardson John E. (2009). Marketing 08/09. American: McGraw -Hill.

Chicago Style aipamena

Richardson John E. Marketing 08/09. American: McGraw -Hill, 2009.

MLA aipamena

Richardson John E. Marketing 08/09. American: McGraw -Hill, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.