APA aipamena

Porter, J. B., Durley, R. J., Stansfield, E., Denis, T. C., Brunton, S. L., De Hart, J. B., . . . Cameron, A. E. (1912). An investigation of the coals of Canada: With reference to their economic qualities. Government printing bureau.

Chicago Style aipamena

Porter, John Bonsall, Richard John Durley, Edgar Stansfield, Theophile Constant Denis, Stopford Lauder Brunton, Joseph Bertram De Hart, Edward Eric Billington, and Alan Emerson Cameron. An Investigation of the Coals of Canada: With Reference to Their Economic Qualities. Ottawa: Government printing bureau, 1912.

MLA aipamena

Porter, John Bonsall, et al. An Investigation of the Coals of Canada: With Reference to Their Economic Qualities. Government printing bureau, 1912.