APA (7th ed.) Citation

Cull, J. G., & Hardy, R. E. (1976). Problems and runaway youth.

Chicago Style (17th ed.) Citation

Cull, John G., and Richard E. Hardy. Problems and Runaway Youth. Springfield, Ill, 1976.

MLA (9th ed.) Citation

Cull, John G., and Richard E. Hardy. Problems and Runaway Youth. 1976.