APA Edition Citation

Adams, C., Early, M., Brook, J., & Bamford, K. Principles of horticulture: Level 2 (7th edition.).

Chicago Edition Citation

Adams, Charles, Mike Early, Jane Brook, and Katherine Bamford. Principles of Horticulture: Level 2. 7th edition.

MLA Edition Citation

Adams, Charles, et al. Principles of Horticulture: Level 2. 7th edition.