Emerson, E., McGill, P., & Mansell, J. (1994). Severe learning disabilities and challenging behaviours: Designing high quality services ([1st ed.].). Chapman and Hall.
Cita Chicago Style (17a ed.)Emerson, Eric, Peter McGill, y Jim Mansell. Severe Learning Disabilities and Challenging Behaviours: Designing High Quality Services. [1st ed.]. London [etc.]: Chapman and Hall, 1994.
Cita MLA (9a ed.)Emerson, Eric, et al. Severe Learning Disabilities and Challenging Behaviours: Designing High Quality Services. [1st ed.]. Chapman and Hall, 1994.
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