How do I cite an article in an online e-textbook in APA format? It's Under Armour's Strategy in 2019: It's Struggle to Revive North American Sales and Profitability by Arthur A. Thompson from The University of Alabama. It was copyrighted in 2020. The e-texted book is Essentials of Strategic Management: The Quest for Competitive Advantage by John E. Gamble, Arthur A. Thompson, and Margaret Peteraf. It is the 7th edition and was published on February 10, 2020. The article is on page 138.

How would I cite the whole e-textbook?