Gaya APA
, ., E, I, S, M. (1985).
Systematic instruction of the moderately and severely handicapped .
London:
London: A Bell & Howell; 1985.
Gaya MLA
, ., E, I., Snell,, Martha.
"Systematic instruction of the moderately and severely handicapped".
London:
London: A Bell & Howell; 1985,
1985.
Text.