Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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