Citazione Stile APA (7a Edizione)

Fraga, L. R. (2012). United States government: Principles in practice (Student ed.). Holt McDougal.

Citazione stile Chigago Style (17a edizione)

Fraga, Luis Ricardo. United States Government: Principles in Practice. Student ed. Orlando, Florida: Holt McDougal, 2012.

Citatione MLA (9a ed.)

Fraga, Luis Ricardo. United States Government: Principles in Practice. Student ed. Holt McDougal, 2012.