Torkildsen, G. (1986). leisure and recreation management (2nd. ed.). E.& F. N. Spon.
Chicago Style (17th ed.) ZitazioaTorkildsen, George. Leisure and Recreation Management. 2nd. ed. London: E.& F. N. Spon, 1986.
MLA (9th ed.) ZitazioaTorkildsen, George. Leisure and Recreation Management. 2nd. ed. E.& F. N. Spon, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.