Spaulding, H. F. (1950). Report on research in audio-visual aids to education. International Council of Religious Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpaulding, Helen F. Report on Research in Audio-visual Aids to Education. Chicago: International Council of Religious Education, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpaulding, Helen F. Report on Research in Audio-visual Aids to Education. International Council of Religious Education, 1950.
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