APA aipamena

RIES,TRONF. (1993). POSITIONING. MCGRAW HILL WARNER BOOKS.

Chicago Style aipamena

RIES,TRONF. POSITIONING. NEW YORK: MCGRAW HILL WARNER BOOKS, 1993.

MLA aipamena

RIES,TRONF. POSITIONING. MCGRAW HILL WARNER BOOKS, 1993.