APA (7th ed.) Citation

Selk, J. (2018). Executive toughness: The mental-training program to increase your leadership performance (Updated edition.). McGraw-Hill Education.

Chicago Style (17th ed.) Citation

Selk, Jason. Executive Toughness: The Mental-training Program to Increase Your Leadership Performance. Updated edition. New York: McGraw-Hill Education, 2018.

MLA (8th ed.) Citation

Selk, Jason. Executive Toughness: The Mental-training Program to Increase Your Leadership Performance. Updated edition. McGraw-Hill Education, 2018.

Warning: These citations may not always be 100% accurate.