Grant, Robert M. 2016. Contemporary Strategy Analysis: Text and Cases. 9th ed. Chichester, West Sussex: Wiley.
Johnson, Gerry. 2014. Exploring Strategy: Text & Cases. 10th ed. Harlow, Essex: Pearson. https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=5138114.
Johnson, Gerry, Richard Whittington, Kevan Scholes, Duncan Angwin, and Patrick Regner. 2016. Exploring Strategy: Text and Cases. Eleveth edition. Vol. Always learning. Harlow, England: Pearson Education. https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=5186321.