Hillman, Gary (February 2009). "The Harvard Flyer"(PDF). Harvard Historical Aviation Society. Archived from the original(PDF) on 20 December 2016. Retrieved 15 December 2016.
"Airspeed Oxford". Air Force Museum of New Zealand. Archived from the original on 2 April 2015. Retrieved 15 December 2016.
Hillman, Gary (February 2009). "The Harvard Flyer"(PDF). Harvard Historical Aviation Society. Archived from the original(PDF) on 20 December 2016. Retrieved 15 December 2016.