APA
Wilkinson R., . (2010). The spirit level : why equality is better for everyone. London: Penguin Books.
Chicago
Wilkinson Richard, . 2010. The spirit level : why equality is better for everyone. London: Penguin Books.
Harvard
Wilkinson R., . (2010). The spirit level : why equality is better for everyone. London: Penguin Books.
MLA
Wilkinson Richard, . The spirit level : why equality is better for everyone. London: Penguin Books. 2010.