APA-viite (7. p.)
Caro, T. M., & Girling, S. (2010). Conservation by proxy: Indicator, umbrella, keystone, flagship, and other surrogate species. Island Press.
Chicago-viite (17. p.)
Caro, T. M., ja Sheila Girling. Conservation by Proxy: Indicator, Umbrella, Keystone, Flagship, and Other Surrogate Species. Washington, DC: Island Press, 2010.
MLA-viite (9. p.)
Caro, T. M., ja Sheila Girling. Conservation by Proxy: Indicator, Umbrella, Keystone, Flagship, and Other Surrogate Species. Island Press, 2010.
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