APA (7th ed.) Citation

GH, C., & PI, H. (1983). External quality assessment in clinical chemistry. Medical laboratory sciences, 40(3), 263.

Chicago Style (17th ed.) Citation

GH, Cummings, and Howell PI. "External Quality Assessment in Clinical Chemistry." Medical Laboratory Sciences 40, no. 3 (1983): 263.

MLA (9th ed.) Citation

GH, Cummings, and Howell PI. "External Quality Assessment in Clinical Chemistry." Medical Laboratory Sciences, vol. 40, no. 3, 1983, p. 263.