APA

Childe V. G., . (1954). What happened in history. Harmondsworth: Penguin Books.

Chicago

Childe Vere Gordon, . 1954. What happened in history. Harmondsworth: Penguin Books.

Harvard

Childe V. G., . (1954). What happened in history. Harmondsworth: Penguin Books.

MLA

Childe Vere Gordon, . What happened in history. Harmondsworth: Penguin Books. 1954.