APA (7th ed.) Citation

Clark, R. E. (1989). Evaluating distance learning technology. [The Office].

Chicago Style (17th ed.) Citation

Clark, Richard E. Evaluating Distance Learning Technology. [Washington, D.C.?]: [The Office], 1989.

MLA (9th ed.) Citation

Clark, Richard E. Evaluating Distance Learning Technology. [The Office], 1989.