APA (7th ed.) Citation

Sinnott-Armstrong, W., & Fogelin, R. J. (2010). Understanding arguments: An introduction to informal logic (8th ed.). Wadsworth, Cengage Learning.

Chicago Style (17th ed.) Citation

Sinnott-Armstrong, Walter, and Robert J. Fogelin. Understanding Arguments: An Introduction to Informal Logic. 8th ed. Australia: Wadsworth, Cengage Learning, 2010.

MLA (9th ed.) Citation

Sinnott-Armstrong, Walter, and Robert J. Fogelin. Understanding Arguments: An Introduction to Informal Logic. 8th ed. Wadsworth, Cengage Learning, 2010.