Strahan, A., Pollard, W., & Radley, E. G. (1908). The coals of South Wales: With special reference to the origin and distribution of anthracite. Wyman.
Čikaški stil citiranja (17. izdanje)Strahan, Aubrey, William Pollard, i Ernest George Radley. The Coals of South Wales: With Special Reference to the Origin and Distribution of Anthracite. London: Wyman, 1908.
MLA način citiranja (8. izdanje)Strahan, Aubrey, et al. The Coals of South Wales: With Special Reference to the Origin and Distribution of Anthracite. Wyman, 1908.
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