APA (7th ed.) Citation

Collinson, C. W. S. Field Book: Pennsylvanian Plant Fossils of Illinois.

Chicago Style (17th ed.) Citation

Collinson, Charles William; Skartvedt. Field Book: Pennsylvanian Plant Fossils of Illinois.

MLA (9th ed.) Citation

Collinson, Charles William; Skartvedt. Field Book: Pennsylvanian Plant Fossils of Illinois.

Warning: These citations may not always be 100% accurate.