APA (7th ed.) Citation

Dalziel, N., & MacKenzie, J. M. (2006). The penguin historical atlas of the British Empire. Penguin.

Chicago Style (17th ed.) Citation

Dalziel, Nigel, and John MacDonald MacKenzie. The Penguin Historical Atlas of the British Empire. London ; New York ; Toronto [etc.]: Penguin, 2006.

MLA (9th ed.) Citation

Dalziel, Nigel, and John MacDonald MacKenzie. The Penguin Historical Atlas of the British Empire. Penguin, 2006.