Crossley, J. C., & Jamieson, L. M. (1988). Introduction to commercial and entrepreneurial recreation. Sagamore Publishing.
Citazione stile Chigago Style (17a edizione)Crossley, John C., e Lynn Marie Jamieson. Introduction to Commercial and Entrepreneurial Recreation. Champaign, IL: Sagamore Publishing, 1988.
Citatione MLA (9a ed.)Crossley, John C., e Lynn Marie Jamieson. Introduction to Commercial and Entrepreneurial Recreation. Sagamore Publishing, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.