APA (7th ed.) Citation

Park, S., Coull, J., McShane, R., Young, A., Sahakian, B., Robbins, T., & Cowen, P. (1994). Tryptophan depletion in normal volunteers produces selective impairments in learning and memory.

Chicago Style (17th ed.) Citation

Park, S., J. Coull, R. McShane, A. Young, B. Sahakian, T. Robbins, and P. Cowen. Tryptophan Depletion in Normal Volunteers Produces Selective Impairments in Learning and Memory. 1994.

MLA (9th ed.) Citation

Park, S., et al. Tryptophan Depletion in Normal Volunteers Produces Selective Impairments in Learning and Memory. 1994.