Cita APA (7a ed.)

Alpern, G. D., & Boll, T. J. (1971). Education and care of moderately and severely retarded children: With a curriculum and activities guide. Special Child Publications.

Cita Chicago Style (17a ed.)

Alpern, Gerald D., y Thomas J. Boll. Education and Care of Moderately and Severely Retarded Children: With a Curriculum and Activities Guide. [Seattle]: Special Child Publications, 1971.

Cita MLA (8a ed.)

Alpern, Gerald D., y Thomas J. Boll. Education and Care of Moderately and Severely Retarded Children: With a Curriculum and Activities Guide. Special Child Publications, 1971.