Zinn, R. (2015). Tough Things First: Leadership Lessons from Silicon Valley's Longest Serving CEO (1st edition.). McGraw-Hill.
Chicago Style (17th ed.) CitationZinn, Ray. Tough Things First: Leadership Lessons from Silicon Valley's Longest Serving CEO. 1st edition. McGraw-Hill, 2015.
MLA (9th ed.) CitationZinn, Ray. Tough Things First: Leadership Lessons from Silicon Valley's Longest Serving CEO. 1st edition. McGraw-Hill, 2015.
Warning: These citations may not always be 100% accurate.