Austin, D. R., & Crawford, M. E. (1991). Therapeutic recreation: An introduction. Prentice-Hall.
Chicago Style aipamenaAustin, David R., and Michael E. Crawford. Therapeutic Recreation: An Introduction. Englewood Cliffs, NJ: Prentice-Hall, 1991.
MLA aipamenaAustin, David R., and Michael E. Crawford. Therapeutic Recreation: An Introduction. Prentice-Hall, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.