Cita APA (7th ed.)

Brown, I., & Percy, M. E. (2007). A Comprehensive guide to intellectual and developmental disabilities. P. H. Brookes.

Cita Chicago (17th ed.)

Brown, Ivan, i Maire Ede Percy. A Comprehensive Guide to Intellectual and Developmental Disabilities. Baltimore, Md: P. H. Brookes, 2007.

Cita MLA (9th ed.)

Brown, Ivan, i Maire Ede Percy. A Comprehensive Guide to Intellectual and Developmental Disabilities. P. H. Brookes, 2007.