Abraham, N., & Palffy-Muhoray, P. (2004). A Dunking Bird of the Second Kind (1–). American Journal of Physics. https://oaks.kent.edu/node/1187
Abraham, Nadine, and Peter Palffy-Muhoray. 2004. “A Dunking Bird of the Second Kind”. American Journal of Physics. https://oaks.kent.edu/node/1187.
Abraham, Nadine, and Peter Palffy-Muhoray. A Dunking Bird of the Second Kind. American Journal of Physics, 1 June 2004, https://oaks.kent.edu/node/1187.