APA
Keillor B. D. (., . (2007). Marketing in the 21st century Vol.4. U.S.A: Praeger.
Chicago
Keillor Bruce D (Ed), . 2007. Marketing in the 21st century Vol.4. U.S.A: Praeger.
Harvard
Keillor B. D. (., . (2007). Marketing in the 21st century Vol.4. U.S.A: Praeger.
MLA
Keillor Bruce D (Ed), . Marketing in the 21st century Vol.4. U.S.A: Praeger. 2007.