Gallo, Donald R. Ultimate Sports, p. 298. راندوم هاوس, 2009. (ردمك 9780307568434). Accessed May 16, 2016. "As a teenager David Klass played baseball and soccer at Leonia Public High School and went on to do the same at Yale University, from which he graduated." نسخة محفوظة 12 مارس 2020 على موقع واي باك مشين.
Gallo, Donald R. Ultimate Sports, p. 298. راندوم هاوس, 2009. (ردمك 9780307568434). Accessed May 16, 2016. "As a teenager David Klass played baseball and soccer at Leonia Public High School and went on to do the same at Yale University, from which he graduated." نسخة محفوظة 12 مارس 2020 على موقع واي باك مشين.
