APA (7th ed.) Citation

Harris, D. (1987). Openness and closure in distance education (1. publ.). Falmer Press.

Chicago Style (17th ed.) Citation

Harris, David. Openness and Closure in Distance Education. 1. publ. London u.a: Falmer Press, 1987.

MLA (9th ed.) Citation

Harris, David. Openness and Closure in Distance Education. 1. publ. Falmer Press, 1987.