Cita APA (7th ed.)

Elton, G. (1967). The practice of history. Thomas Y.Cromwell Co..

Cita Chicago (17th ed.)

Elton, G.R. The Practice of History. New York: Thomas Y.Cromwell Co., 1967.

Cita MLA (9th ed.)

Elton, G.R. The Practice of History. Thomas Y.Cromwell Co., 1967.