APA

Ulph Alistair,, . (2001). Environmental policy, international agreements and international trade. Oxford: Oxford University Press.

Chicago

Ulph Alistair,, . 2001. Environmental policy, international agreements and international trade. Oxford: Oxford University Press.

Harvard

Ulph Alistair,, . (2001). Environmental policy, international agreements and international trade. Oxford: Oxford University Press.

MLA

Ulph Alistair,, . Environmental policy, international agreements and international trade. Oxford: Oxford University Press. 2001.