APA (7th ed.) Citation

Freeman, M., & Groom, B. (2013). Biodiversity valuation and the discount rate problem.

Chicago Style (17th ed.) Citation

Freeman, Mark, and Ben Groom. Biodiversity Valuation and the Discount Rate Problem. 2013.

MLA (9th ed.) Citation

Freeman, Mark, and Ben Groom. Biodiversity Valuation and the Discount Rate Problem. 2013.

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