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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPennsylvania State University. Office for Distance Education এবং 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.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPennsylvania State University. Office for Distance Education এবং 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.