International Council for Correspondence Education. World Conference & Wentworth, R. B. (1978). Correspondence education, dynamic and diversified: Eleventh World Conference, Hotel Ashoka, New Delhi, India, 8-15 November 1978. s.n..
Цитирование в стиле Чикаго (17-е изд.)International Council for Correspondence Education. World Conference и Robert B. Wentworth. Correspondence Education, Dynamic and Diversified: Eleventh World Conference, Hotel Ashoka, New Delhi, India, 8-15 November 1978. [s.l.: s.n., 1978.
Цитирование MLA (8-е изд.)International Council for Correspondence Education. World Conference и Robert B. Wentworth. Correspondence Education, Dynamic and Diversified: Eleventh World Conference, Hotel Ashoka, New Delhi, India, 8-15 November 1978. s.n., 1978.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.