Gaya APA

Gamble, J, E. et al (2013). Essentials of Strategic Management-The Quest for Competitive Advantage (3rd edition). NEW YORK: McGraw Hill.

Gaya MLA

Gamble, John, E.. et al. "Essentials of Strategic Management-The Quest for Competitive Advantage". 3rd edition NEW YORK: McGraw Hill, 2013. Text.