APA (7th ed.) Citation

Penrose, L. S., Haldane, J. B. S., Berg, J. M., & Lang-Brown, H. (1963). The biology of mental defect (3rd (rev. and reset) ed.). Sidgwick and Jackson Limited.

Chicago Style (17th ed.) Citation

Penrose, L. S., J. B. S. Haldane, J. M. Berg, and Helen Lang-Brown. The Biology of Mental Defect. 3rd (rev. and reset) ed. London: Sidgwick and Jackson Limited, 1963.

MLA (9th ed.) Citation

Penrose, L. S., et al. The Biology of Mental Defect. 3rd (rev. and reset) ed. Sidgwick and Jackson Limited, 1963.