Cita APA (7th ed.)

Murphy, D. P., & Armstrong, S. (2015). AP U.S. history 2015. McGraw Hill Education.

Cita Chicago (17th ed.)

Murphy, Daniel P., i Stephen Armstrong. AP U.S. History 2015. New York: McGraw Hill Education, 2015.

Cita MLA (9th ed.)

Murphy, Daniel P., i Stephen Armstrong. AP U.S. History 2015. McGraw Hill Education, 2015.