APA

Voorhees John, Woellner Robert A, . (1998). International environmental risk management : ISO 14000 and the systems approach. New York: Lewis Publishers.

Chicago

Voorhees John, Woellner Robert A, . 1998. International environmental risk management : ISO 14000 and the systems approach. New York: Lewis Publishers.

Harvard

Voorhees John, Woellner Robert A, . (1998). International environmental risk management : ISO 14000 and the systems approach. New York: Lewis Publishers.

MLA

Voorhees John, Woellner Robert A, . International environmental risk management : ISO 14000 and the systems approach. New York: Lewis Publishers. 1998.