Freire. (2013). Positive Leisure Science (1.). Springer Netherlands.
Cita Chicago (17th ed.)Freire. Positive Leisure Science. 1. Springer Netherlands, 2013.
Cita MLA (8th ed.)Freire. Positive Leisure Science. 1. Springer Netherlands, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.