APA (7th ed.) Citation

Erskine, B. (2014). The Darkest hour. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Erskine, Barbara. The Darkest Hour. London: HarperCollins Publishers, 2014.

MLA (9th ed.) Citation

Erskine, Barbara. The Darkest Hour. HarperCollins Publishers, 2014.

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