Cita APA

Gilbert, M. (1998). A history of the twentieth century: Vol. 2 1933 - 1951. A history of the twentieth century, 2.1998.

Citación estilo Chicago

Gilbert, Martin. "A History of the Twentieth Century: Vol. 2 1933 - 1951." A History of the Twentieth Century 1998: 2.1998.

Cita MLA

Gilbert, Martin. "A History of the Twentieth Century: Vol. 2 1933 - 1951." A History of the Twentieth Century, 1998, p. 2.1998.