APA (7th ed.) Citation

Hadley, N. H. (1984). Fingernail biting: Theory, research, and treatment. SP Medical & Scientific Books.

Chicago Style (17th ed.) Citation

Hadley, N. H. Fingernail Biting: Theory, Research, and Treatment. New York: SP Medical & Scientific Books, 1984.

MLA (9th ed.) Citation

Hadley, N. H. Fingernail Biting: Theory, Research, and Treatment. SP Medical & Scientific Books, 1984.