APA

Plumb J H, . (1956). The first four Georges. London: Fontana.

Chicago

Plumb J H, . 1956. The first four Georges. London: Fontana.

Harvard

Plumb J H, . (1956). The first four Georges. London: Fontana.

MLA

Plumb J H, . The first four Georges. London: Fontana. 1956.