Haley, B. R. (1960). Coal resources of Arkansas, 1954: Contributions to economic geology. United States Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Haley, Boyd R. Coal Resources of Arkansas, 1954: Contributions to Economic Geology. Washington: United States Government Printing Office, 1960.
MLA-Zitierstil (9. Ausg.)Haley, Boyd R. Coal Resources of Arkansas, 1954: Contributions to Economic Geology. United States Government Printing Office, 1960.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.