APA

,, . (1996). Environment industry year book 1997. London: Macmillan Press.

Chicago

,, . 1996. Environment industry year book 1997. London: Macmillan Press.

Harvard

,, . (1996). Environment industry year book 1997. London: Macmillan Press.

MLA

,, . Environment industry year book 1997. London: Macmillan Press. 1996.