Mackenzie, N., & et al.;Mackenzie, N. (1975). Open learning: Systems and problems in post-secondary education. UNESCO Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMackenzie, Norman, और Norman et al.;Mackenzie. Open Learning: Systems and Problems in Post-secondary Education. UNESCO Press, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMackenzie, Norman, और Norman et al.;Mackenzie. Open Learning: Systems and Problems in Post-secondary Education. UNESCO Press, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.