APA (7th ed.) Citation

Newman, H. H., Freeman, F. N., & Holzinger, K. J. (1968). Twins: A study of heredity and environment (4.impr.). Univ.Pr.

Chicago Style (17th ed.) Citation

Newman, Horatio H., Frank N. Freeman, and Karl J. Holzinger. Twins: A Study of Heredity and Environment. 4.impr. Chicago: Univ.Pr, 1968.

MLA (9th ed.) Citation

Newman, Horatio H., et al. Twins: A Study of Heredity and Environment. 4.impr. Univ.Pr, 1968.