Cita APA (7a ed.)

Barth, A., & Barber, J. D. (1965). Heritage of liberty. Webster Division, McGraw Hill.

Cita Chicago Style (17a ed.)

Barth, Alan, y James David Barber. Heritage of Liberty. St. Louis: Webster Division, McGraw Hill, 1965.

Cita MLA (8a ed.)

Barth, Alan, y James David Barber. Heritage of Liberty. Webster Division, McGraw Hill, 1965.