Stuar J.H. Biddle; Panteleimon Ekkekakis (2005). "Physically active lifestyles and well-being". Dalam Felicia A. Huppert; Nick Baylis; Barry Keverne. The Science of Well-being. Oxford University Press. hlm. 161. ISBN9780198567523.Parameter |name-list-style= yang tidak diketahui akan diabaikan (bantuan)