Simpson, J. B., Pringle, J., & Richey, J. E. (1936). The geology of the Sanquhar coalfield and adjacent basin of Thornhill. H.M. Stationery Off..
Chicago Style (17. basım) AtıfSimpson, J. B., J. Pringle, ve J. E. Richey. The Geology of the Sanquhar Coalfield and Adjacent Basin of Thornhill. Edinburgh: H.M. Stationery Off., 1936.
MLA (8th ed.) AtıfSimpson, J. B., et al. The Geology of the Sanquhar Coalfield and Adjacent Basin of Thornhill. H.M. Stationery Off., 1936.
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