KOUL B N. (1988). STUDIES IN DISTANCE EDUCATION. ASSOCIATION OF INDIAN UNIVERSITIES.
芝加哥风格引文KOUL B N. STUDIES IN DISTANCE EDUCATION. NEW DELHI: ASSOCIATION OF INDIAN UNIVERSITIES, 1988.
MLA引文KOUL B N. STUDIES IN DISTANCE EDUCATION. ASSOCIATION OF INDIAN UNIVERSITIES, 1988.
警告：这些引文格式不一定是100％准确.