Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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