APA (7th ed.) Citation

Walker, R. (2010). Pushes & pulls: Why do people migrate? Crabtree Pub. Company.

Chicago Style (17th ed.) Citation

Walker, Robert. Pushes & Pulls: Why Do People Migrate? New York: Crabtree Pub. Company, 2010.

MLA (9th ed.) Citation

Walker, Robert. Pushes & Pulls: Why Do People Migrate? Crabtree Pub. Company, 2010.

Warning: These citations may not always be 100% accurate.