APA (7th ed.) Citation

NetLibrary, Inc, Duffy, T. M., & Kirkley, J. R. (2004). Learner-centered theory and practice in distance education: Cases from higher education. Lawrence Erlbaum Associates.

Chicago Style (17th ed.) Citation

NetLibrary, Inc, Thomas M. Duffy, and Jamie R. Kirkley. Learner-centered Theory and Practice in Distance Education: Cases from Higher Education. Mahwah, N.J.: Lawrence Erlbaum Associates, 2004.

MLA (9th ed.) Citation

NetLibrary, Inc, et al. Learner-centered Theory and Practice in Distance Education: Cases from Higher Education. Lawrence Erlbaum Associates, 2004.