APA-referens (7:e uppl.)
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.
Chicago-referens (17:e uppl.)
Helmcken, John Sebastian, och 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.
MLA-referens (9:e uppl.)
Helmcken, John Sebastian, och 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.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.