Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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