(2003). Teaching and learning at a distance: Foundations of distance education. Upper Saddle River, N.J: Merrill/Prentice Hall.
Trích dẫn kiểu ChicagoTeaching and Learning At a Distance: Foundations of Distance Education. Upper Saddle River, N.J: Merrill/Prentice Hall, 2003.
ציטוט MLATeaching and Learning At a Distance: Foundations of Distance Education. Upper Saddle River, N.J: Merrill/Prentice Hall, 2003.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.