APA (7th ed.) Citation

Wald, N., Barker, S., Peto, R., Brock, D., & Bonnar, J. (1976). Maternal serum alpha-fetoprotein and previous neural tube defects.

Chicago Style (17th ed.) Citation

Wald, N., S. Barker, R. Peto, D. Brock, and J. Bonnar. Maternal Serum Alpha-fetoprotein and Previous Neural Tube Defects. 1976.

MLA (9th ed.) Citation

Wald, N., et al. Maternal Serum Alpha-fetoprotein and Previous Neural Tube Defects. 1976.