APA (7th ed.) Citation

Gier, K., & Bell, A. (2012). Sapphire blue (1st American ed.). Henry Holt.

Chicago Style (17th ed.) Citation

Gier, Kerstin, and Anthea Bell. Sapphire Blue. 1st American ed. New York: Henry Holt, 2012.

MLA (8th ed.) Citation

Gier, Kerstin, and Anthea Bell. Sapphire Blue. 1st American ed. Henry Holt, 2012.

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