APA (7th ed.) Citation

Garrison, D. R., & Shale, D. (1990). Education at a distance: From issues to practice (Original ed.). R.E. Krieger Pub. Co..

Chicago Style (17th ed.) Citation

Garrison, D. R., and Doug Shale. Education at a Distance: From Issues to Practice. Original ed. Malabar, Fla.: R.E. Krieger Pub. Co., 1990.

MLA (9th ed.) Citation

Garrison, D. R., and Doug Shale. Education at a Distance: From Issues to Practice. Original ed. R.E. Krieger Pub. Co., 1990.