APA (7th ed.) Citation

Horton, W. K. (2012). E-learning by design (2nd ed.). Pfeiffer.

Chicago Style (17th ed.) Citation

Horton, William K. E-learning by Design. 2nd ed. San Francisco, CA: Pfeiffer, 2012.

MLA (9th ed.) Citation

Horton, William K. E-learning by Design. 2nd ed. Pfeiffer, 2012.