Pennsylvania State University. Office for Distance Education & American Center for the Study of Distance Education. (1987). The American journal of distance education. Office for Distance Education of the College of Education at the Pennsylvania State University.
Citazione stile Chigago Style (17a edizione)Pennsylvania State University. Office for Distance Education e American Center for the Study of Distance Education. The American Journal of Distance Education. University Park, PA: Office for Distance Education of the College of Education at the Pennsylvania State University, 1987.
Citatione MLA (9a ed.)Pennsylvania State University. Office for Distance Education e American Center for the Study of Distance Education. The American Journal of Distance Education. Office for Distance Education of the College of Education at the Pennsylvania State University, 1987.