APA (7th ed.) Citation

Bell, C. R. (1967). Plant variation and classification. Wadsworth Pub. Co..

Chicago Style (17th ed.) Citation

Bell, C. Ritchie. Plant Variation and Classification. Belmont, Calif.: Wadsworth Pub. Co., 1967.

MLA (9th ed.) Citation

Bell, C. Ritchie. Plant Variation and Classification. Wadsworth Pub. Co., 1967.