APA (7th ed.) Citation

Heckel, P. H., Mitchell, J. C., Nelson, D. L., & Ravn, R. L. (1978). Guidebook: Upper Pennsylvanian cyclothemic limestone facies in eastern Kansas. Kansas State Geological Survey.

Chicago Style (17th ed.) Citation

Heckel, Philip H., John C. Mitchell, David L. Nelson, and Robert L. Ravn. Guidebook: Upper Pennsylvanian Cyclothemic Limestone Facies in Eastern Kansas. [Lawrence]: Kansas State Geological Survey, 1978.

MLA (9th ed.) Citation

Heckel, Philip H., et al. Guidebook: Upper Pennsylvanian Cyclothemic Limestone Facies in Eastern Kansas. Kansas State Geological Survey, 1978.