APA

Bureau of Economic Geology, . (19). Guidebook / The University of Texas, Bureau of Economic Geology. Austin, Tex: .

Chicago

Bureau of Economic Geology, . 19. Guidebook / The University of Texas, Bureau of Economic Geology. Austin, Tex: .

Harvard

Bureau of Economic Geology, . (19). Guidebook / The University of Texas, Bureau of Economic Geology. Austin, Tex: .

MLA

Bureau of Economic Geology, . Guidebook / The University of Texas, Bureau of Economic Geology. Austin, Tex: . 19.