ITV Studios, Apted, M., Balden, B., Bassett, J., & Basterfield, S. (2012). 56 up (Educational/non-theatrical version.). ITV Studios Ltd., First Run Features.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रITV Studios, Michael Apted, Bruce Balden, Jacqueline Bassett, और Symon Basterfield. 56 Up. Educational/non-theatrical version. [London, England] : New York, NY: ITV Studios Ltd., First Run Features, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रITV Studios, et al. 56 Up. Educational/non-theatrical version. ITV Studios Ltd., First Run Features, 2012.
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