Spaulding, H. F. (1952). Audio-visual research: Report to the 1952 audio-visual workshop. National Council of Churches.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpaulding, Helen F. Audio-visual Research: Report to the 1952 Audio-visual Workshop. Chicago: National Council of Churches, 1952.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpaulding, Helen F. Audio-visual Research: Report to the 1952 Audio-visual Workshop. National Council of Churches, 1952.
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