Robertson, F. S., & Marshall, F. C. (1975). Historical geology: Manual of laboratory exercises (3d ed.). Burgess Pub. Co..
Chicago Style (17th ed.) CitationRobertson, Forbes Smith, and Frederick C. Marshall. Historical Geology: Manual of Laboratory Exercises. 3d ed. Minneapolis: Burgess Pub. Co., 1975.
MLA (8th ed.) CitationRobertson, Forbes Smith, and Frederick C. Marshall. Historical Geology: Manual of Laboratory Exercises. 3d ed. Burgess Pub. Co., 1975.
Warning: These citations may not always be 100% accurate.