Kelly, J. F., Miller, P. E., & Hartsell, A. J. (1993). Forest statistics for Southeast Oklahoma counties, 1993. USDA Forest Service, Southern Forest Experiment Station.
Chicago-Zitierstil (17. Ausg.)Kelly, John F., Patrick E. Miller, und Andrew J. Hartsell. Forest Statistics for Southeast Oklahoma Counties, 1993. New Orleans, La: USDA Forest Service, Southern Forest Experiment Station, 1993.
MLA-Zitierstil (9. Ausg.)Kelly, John F., et al. Forest Statistics for Southeast Oklahoma Counties, 1993. USDA Forest Service, Southern Forest Experiment Station, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.