Johnston, H. J. M. (1989). The voyage of the Komagata Maru: The Sikh challenge to Canada's colour bar (2nd ed.). University of British Columbia Press.

Johnston, Hugh J. M. The Voyage of the Komagata Maru: The Sikh Challenge to Canada's Colour Bar. 2nd ed. Vancouver: University of British Columbia Press, 1989.

Johnston, Hugh J. M. The Voyage of the Komagata Maru: The Sikh Challenge to Canada's Colour Bar. 2nd ed. University of British Columbia Press, 1989.