APA (7th ed.) Citation

Vickers, H. (1979). Gladys, Duchess of Marlborough.

Chicago Style (17th ed.) Citation

Vickers, Hugo. Gladys, Duchess of Marlborough. 1979.

MLA (9th ed.) Citation

Vickers, Hugo. Gladys, Duchess of Marlborough. 1979.

Warning: These citations may not always be 100% accurate.