APA (7 वां संस्करण) प्रशस्ति पत्र
Helmcken, J. S., & Smith, D. B. (1975). The reminiscences of Doctor John Sebastian Helmcken. University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Helmcken, John Sebastian, और Dorothy Blakey Smith. The Reminiscences of Doctor John Sebastian Helmcken. [Vancouver]: University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Helmcken, John Sebastian, और Dorothy Blakey Smith. The Reminiscences of Doctor John Sebastian Helmcken. University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia, 1975.
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