Ashworth, G. J. (1984). Recreation and tourism. Bell & Hyman.
Chicago Style aipamenaAshworth, G. J. Recreation and Tourism. London: Bell & Hyman, 1984.
MLA aipamenaAshworth, G. J. Recreation and Tourism. Bell & Hyman, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.