Programed instruction for the younger learner:
a comparison of two presentation modes in two environments /
by Lassar G. Gotkin and Leo S. Goldstein.
APA Citation
Gotkin, L. G., Goldstein, L. S.., Center for Programed Instruction, N. (1962). Programed instruction for the younger learner: a comparison of two presentation modes in two environments. New York: Center for Programed Instruction.
MLA Citation
Gotkin, Lassar G, Leo S. Goldstein, and N.Y Center for Programed Instruction. Programed Instruction for the Younger Learner: a Comparison of Two Presentation Modes In Two Environments. New York: Center for Programed Instruction, 1962.
Warning: These citations may not always be complete (especially for serials).