APA (7th ed.) Citation

Erskine, B. (2014). The darkest hour. London : HarperCollinsPublishers.

Chicago Style (17th ed.) Citation

Erskine, Barbara. The Darkest Hour. London : HarperCollinsPublishers, 2014.

MLA (9th ed.) Citation

Erskine, Barbara. The Darkest Hour. London : HarperCollinsPublishers, 2014.

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