APA

Ridley M. [., . (2003). Nature via nature. New York: Harper Collins Publishers.

Chicago

Ridley Matt [F], . 2003. Nature via nature. New York: Harper Collins Publishers.

Harvard

Ridley M. [., . (2003). Nature via nature. New York: Harper Collins Publishers.

MLA

Ridley Matt [F], . Nature via nature. New York: Harper Collins Publishers. 2003.