Gucciardi, D. F., Peeling, P., Ducker, K. J., & Dawson, B. (2016). When the going gets tough: Mental toughness and its relationship with behavioural perseverance. Journal of science and medicine in sport, 19(1), S. 81–86. doi:10.1016/j.jsams.2014.12.005

Gucciardi, Daniel F., Peter Peeling, Kagan J. Ducker, and Brian Dawson. "When the Going Gets Tough: Mental Toughness and Its Relationship With Behavioural Perseverance." Journal of Science and Medicine in Sport 19, no. 1 (2016): S. 81–86.

Gucciardi, Daniel F., Peter Peeling, Kagan J. Ducker, and Brian Dawson. "When the Going Gets Tough: Mental Toughness and Its Relationship With Behavioural Perseverance." Journal of Science and Medicine in Sport 19.1 (2016): S. 81–86.