Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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