APA (7th ed.) Citation

Purvis, M. J., Collier, D. C., & Walls, D. (1966). Laboratory techniques in botany (2d ed.). Butterworths.

Chicago Style (17th ed.) Citation

Purvis, M. J., D. C. Collier, and D. Walls. Laboratory Techniques in Botany. 2d ed. [Washington]: Butterworths, 1966.

MLA (9th ed.) Citation

Purvis, M. J., et al. Laboratory Techniques in Botany. 2d ed. Butterworths, 1966.