Cita APA (7th ed.)

Thomas, H. (1979). An unfinished history of the world. H. Hamilton.

Cita Chicago (17th ed.)

Thomas, Hugh. An Unfinished History of the World. London: H. Hamilton, 1979.

Cita MLA (9th ed.)

Thomas, Hugh. An Unfinished History of the World. H. Hamilton, 1979.