APA

Porritt J., . (1992). Save The Earth. London: Dorling Kindersley.

Chicago

Porritt Jonathon, . 1992. Save The Earth. London: Dorling Kindersley.

Harvard

Porritt J., . (1992). Save The Earth. London: Dorling Kindersley.

MLA

Porritt Jonathon, . Save The Earth. London: Dorling Kindersley. 1992.