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.