APA (7th ed.) Citation

Aaker, D. A. (2004). Brand portfolio strategy: Creating relevance, differentiation, energy, leverage, and clarity. Free Press.

Chicago Style (17th ed.) Citation

Aaker, David A. Brand Portfolio Strategy: Creating Relevance, Differentiation, Energy, Leverage, and Clarity. New York: Free Press, 2004.

MLA (9th ed.) Citation

Aaker, David A. Brand Portfolio Strategy: Creating Relevance, Differentiation, Energy, Leverage, and Clarity. Free Press, 2004.