Cita APA (7a ed.)

Sinnott-Armstrong, W., & Fogelin, R. J. (2015). Understanding arguments: An introduction to informal logic (9th ed.). Cengage Learning.

Cita Chicago Style (17a ed.)

Sinnott-Armstrong, Walter, y Robert J. Fogelin. Understanding Arguments: An Introduction to Informal Logic. 9th ed. Stamford (Connecticut): Cengage Learning, 2015.

Cita MLA (9a ed.)

Sinnott-Armstrong, Walter, y Robert J. Fogelin. Understanding Arguments: An Introduction to Informal Logic. 9th ed. Cengage Learning, 2015.