Bruce Friedrich. AngelList. Gearchiveerd op February 16, 2016. Geraadpleegd op 23 februari 2016. “Grinnell College economics, English, religion Phi Beta Kappa”
Friedrich, Gustav W. (1 oktober 2020). National Communication Association Heritage Project. Review of Communication 20 (4): 398–432. DOI:10.1080/15358593.2020.1827495.
"[Unknown title]", The Des Moines Register, 7 maart 2004, p. 34. Gearchiveerd op March 3, 2016. Geraadpleegd op February 23, 2016. “Bruce Friedrich Director of vegan campaigns, People for the Ethical Treatment of Animals Born: Aug. 7, 1969, West Lafayette, Ind. Education: High school, Norman, Okla.; Grinnell College, 1996 graduate, Phi Beta Kappa in English and economics”
"[Unknown title]", The Des Moines Register, 7 maart 2004, p. 34. Gearchiveerd op March 3, 2016. Geraadpleegd op February 23, 2016. “Bruce Friedrich Director of vegan campaigns, People for the Ethical Treatment of Animals Born: Aug. 7, 1969, West Lafayette, Ind. Education: High school, Norman, Okla.; Grinnell College, 1996 graduate, Phi Beta Kappa in English and economics”
Bruce Friedrich. AngelList. Gearchiveerd op February 16, 2016. Geraadpleegd op 23 februari 2016. “Grinnell College economics, English, religion Phi Beta Kappa”