APA (7th ed.) Citation

Ringius, G. S., Meades, S., & Sims, R. A. (1997). Indicator plant species in Canadian forests. Canadian Forest Service.

Chicago Style (17th ed.) Citation

Ringius, Gordon S., Sue Meades, and R. A. Sims. Indicator Plant Species in Canadian Forests. Ottawa: Canadian Forest Service, 1997.

MLA (9th ed.) Citation

Ringius, Gordon S., et al. Indicator Plant Species in Canadian Forests. Canadian Forest Service, 1997.