Janus Films, Criterion Collection (Firm), Anglo American Film Corporation, British Broadcasting Corporation, Powell, M., Howard, L., . . . Vaughan Williams, R. (2007). 49th parallel. Criterion Collection.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJanus Films, et al. 49th Parallel. [Irvington, NY]: Criterion Collection, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJanus Films, et al. 49th Parallel. Criterion Collection, 2007.
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