Harris,, D. (2005). Key concepts in leisure studies. Sage.
Chicago Style aipamenaHarris,, David. Key Concepts in Leisure Studies. London: Sage, 2005.
MLA aipamenaHarris,, David. Key Concepts in Leisure Studies. Sage, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.