APA (7th ed.) Citation

Bell, C. R. (1967). Plant variation and classification. Macmillan.

Chicago Style (17th ed.) Citation

Bell, C. Ritchie. Plant Variation and Classification. London: Macmillan, 1967.

MLA (9th ed.) Citation

Bell, C. Ritchie. Plant Variation and Classification. Macmillan, 1967.

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