توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

International Council for Correspondence Education. World Conference و 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.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

International Council for Correspondence Education. World Conference و Robert B. Wentworth. Correspondence Education, Dynamic and Diversified: Eleventh World Conference, Hotel Ashoka, New Delhi, India, 8-15 November 1978. s.n., 1978.