APA (7th ed.) Citation
Clark, M. H. (2006). Two little girls in blue. Pocket Books.
Chicago Style (17th ed.) Citation
Clark, Mary Higgins. Two Little Girls in Blue. New York: Pocket Books, 2006.
MLA (9th ed.) Citation
Clark, Mary Higgins. Two Little Girls in Blue. Pocket Books, 2006.
Warning: These citations may not always be 100% accurate.