APA

Ridley M., . (2003). Nature via nature. New York: HarperCollins.

Chicago

Ridley Matt, . 2003. Nature via nature. New York: HarperCollins.

Harvard

Ridley M., . (2003). Nature via nature. New York: HarperCollins.

MLA

Ridley Matt, . Nature via nature. New York: HarperCollins. 2003.