Murrin, J. M., Johnson, P. E., McPherson, J. M., Fahs, A., Gerstle, G., Rosenberg, E. S., & Rosenberg, N. L. A history of the american people: Liberty, equality, power [study guide] / by John M. Murrin ... [et al.]. (5th ed.). Boston, USA. : Cengage Learning, c2008.

Murrin, John M., Paul E. Johnson, James M. McPherson, Alice Fahs, Gary Gerstle, Emily S. Rosenberg, and Norman L. Rosenberg. A History of the American People: Liberty, Equality, Power [study Guide] / By John M. Murrin ... [et Al.]. 5th ed. Boston, USA. : Cengage Learning, c2008.

Murrin, John M., et al. A History of the American People: Liberty, Equality, Power [study Guide] / By John M. Murrin ... [et Al.]. 5th ed. Boston, USA. : Cengage Learning, c2008.