Kotler, P., Berger, R., & Bickhoff, N. (2010). The Quintessence of Strategic Management: What You Really Need to Know to Survive in Business. Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-14544-5

Kotler, Philip, Roland Berger, and Nils Bickhoff. The Quintessence of Strategic Management: What You Really Need to Know to Survive in Business. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. https://doi.org/10.1007/978-3-642-14544-5.

Kotler, Philip, et al. The Quintessence of Strategic Management: What You Really Need to Know to Survive in Business. Springer Berlin Heidelberg, 2010. https://doi.org/10.1007/978-3-642-14544-5.