APA (7th ed.) Citation

Knapp, J. Z. (1999). The scientific basis for visible particle inspection. PDA journal of pharmaceutical science and technology, 53(6), 291.

Chicago Style (17th ed.) Citation

Knapp, J Z. "The Scientific Basis for Visible Particle Inspection." PDA Journal of Pharmaceutical Science and Technology 53, no. 6 (1999): 291.

MLA (9th ed.) Citation

Knapp, J Z. "The Scientific Basis for Visible Particle Inspection." PDA Journal of Pharmaceutical Science and Technology, vol. 53, no. 6, 1999, p. 291.