APA (7th ed.) Citation

Simpson, E. S. (1994). The developing world: An introduction (2. ed.). Longman.

Chicago Style (17th ed.) Citation

Simpson, Edward S. The Developing World: An Introduction. 2. ed. Harlow: Longman, 1994.

MLA (9th ed.) Citation

Simpson, Edward S. The Developing World: An Introduction. 2. ed. Longman, 1994.