APA

Castle R. O., Mark R. K., Shaw R. H. & United States Geological Survey. (1994). An empirical assessment of refraction error in leveling as a function of survey order and environment. Washington: United States Government Printing Office.

Chicago

Castle Robert Oliver, Mark R K, Shaw Roger H and United States Geological Survey. 1994. An empirical assessment of refraction error in leveling as a function of survey order and environment. Washington: United States Government Printing Office.

Harvard

Castle R. O., Mark R. K., Shaw R. H. and United States Geological Survey. (1994). An empirical assessment of refraction error in leveling as a function of survey order and environment. Washington: United States Government Printing Office.

MLA

Castle Robert Oliver, Mark R K, Shaw Roger H and United States Geological Survey. An empirical assessment of refraction error in leveling as a function of survey order and environment. Washington: United States Government Printing Office. 1994.