Hawksworth, D. L., & Bull, A. T. (2006). Human exploitation and biodiversity conservation. Springer.
Dyfyniad Arddull ChicagoHawksworth, David L., and Alan T. Bull. Human Exploitation and Biodiversity Conservation. Dordrecht: Springer, 2006.
Dyfyniad MLAHawksworth, David L., and Alan T. Bull. Human Exploitation and Biodiversity Conservation. Springer, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.