Gaya APA
Gagne, R, M., J., I, B, L. (NULL).
Principles of instructional design .
New:
New York: Holt, Rinehart and Winston; 1978.
Gaya MLA
Gagne, Robert, M.., J., I., Briggs,, Leslie.
"Principles of instructional design".
New:
New York: Holt, Rinehart and Winston; 1978,
NULL.
Text.