APA (7th ed.) Citation

Thomas, P. G., & Ince, D. C. (1982). A Programming Language Environment for the Unassisted Learner. Computers and Education, 6(2), 209.

Chicago Style (17th ed.) Citation

Thomas, P. G., and D. C. Ince. "A Programming Language Environment for the Unassisted Learner." Computers and Education 6, no. 2 (1982): 209.

MLA (9th ed.) Citation

Thomas, P. G., and D. C. Ince. "A Programming Language Environment for the Unassisted Learner." Computers and Education, vol. 6, no. 2, 1982, p. 209.