APA (7th ed.) Citation

Mitford, N. (1973). Frederick The Great. Penguin Book.

Chicago Style (17th ed.) Citation

Mitford, Nancy. Frederick The Great. England: Penguin Book, 1973.

MLA (9th ed.) Citation

Mitford, Nancy. Frederick The Great. Penguin Book, 1973.

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