Drug abuse proficiency testing.

MLA

Guerrant, G. O., and C. T. Hall. “Drug Abuse Proficiency Testing.” Clinical Toxicology, vol. 10, no. 2, 1977, pp. 209–19. EBSCOhost, https://doi.org/10.3109/15563657708987967.

APA

Guerrant, G. O., & Hall, C. T. (1977). Drug abuse proficiency testing. Clinical Toxicology, 10(2), 209–219. https://doi.org/10.3109/15563657708987967

Chicago

Guerrant, G O, and C T Hall. 1977. “Drug Abuse Proficiency Testing.” Clinical Toxicology 10 (2): 209–19. doi:10.3109/15563657708987967.