Cita APA (7th ed.)

Fogelin, R. J. (2005). Understanding arguments: An introduction to informal logic (7th ed.). Thomson Wadsworth.

Cita Chicago (17th ed.)

Fogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. 7th ed. Belmont, Calif: Thomson Wadsworth, 2005.

Cita MLA (9th ed.)

Fogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. 7th ed. Thomson Wadsworth, 2005.