APA
Snell M. E., . (1993). Instruction of students with severe disabilities. New York: Maxwell Macmillan International.
Chicago
Snell Martha E, . 1993. Instruction of students with severe disabilities. New York: Maxwell Macmillan International.
Harvard
Snell M. E., . (1993). Instruction of students with severe disabilities. New York: Maxwell Macmillan International.
MLA
Snell Martha E, . Instruction of students with severe disabilities. New York: Maxwell Macmillan International. 1993.