APA (7th ed.) Citation

Yrsa Sigurðardóttir. (2013). The day is dark (1st U.S. ed.). Minotaur Books/Thomas Dunne Books.

Chicago Style (17th ed.) Citation

Yrsa Sigurðardóttir. The Day Is Dark. 1st U.S. ed. New York: Minotaur Books/Thomas Dunne Books, 2013.

MLA (8th ed.) Citation

Yrsa Sigurðardóttir. The Day Is Dark. 1st U.S. ed. Minotaur Books/Thomas Dunne Books, 2013.

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