Gaya APA

Snell, M, E. (1983). Systematic Instruction Of The Moderately And Severely Handicapped Second Edition . Colombus: Charles E. Merrill Publishing Company.

Gaya MLA

Snell, Martha, E.. "Systematic Instruction Of The Moderately And Severely Handicapped Second Edition". Colombus: Charles E. Merrill Publishing Company, 1983. Text.