APA (7th ed.) Citation

Bell, A. D., & Bryan, A. (1991). Plant form: An illustrated guide to flowering plant morphology. Oxford University Press.

Chicago Style (17th ed.) Citation

Bell, Adrian D., and Alan Bryan. Plant Form: An Illustrated Guide to Flowering Plant Morphology. Oxford: Oxford University Press, 1991.

MLA (8th ed.) Citation

Bell, Adrian D., and Alan Bryan. Plant Form: An Illustrated Guide to Flowering Plant Morphology. Oxford University Press, 1991.

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