APA (7th ed.) Citation

Ingenthron, J. G. (1977). Recreation activity interests of mentally retarded young adults. [publisher not identified].

Chicago Style (17th ed.) Citation

Ingenthron, J. Gary. Recreation Activity Interests of Mentally Retarded Young Adults. [Place of publication not identified]: [publisher not identified], 1977.

MLA (9th ed.) Citation

Ingenthron, J. Gary. Recreation Activity Interests of Mentally Retarded Young Adults. [publisher not identified], 1977.