Florence Scovel Shinn (2015). “The Complete Game of Life and How to Play It: The Classic Text with Commentary, Study Questions, Action Items, and Much Mor”, p.71, Hampton Roads Publishing
Said in 1983. "The Pacific Rim and the Western World: Strategic, Economic, and Cultural Perspectives". Book edited by Philip West, Frans A.M. Alting von Geusau, p. 105, 1987.