Jr, P. P., & HJ, P. (1974). Optical diffraction analysis of petrographic thin sections. Science (New York, N.Y.), 186(4160), 234. https://doi.org/10.1126/science.186.4160.234
Chicago Style (17th ed.) CitationJr, Power PC, and Pincus HJ. "Optical Diffraction Analysis of Petrographic Thin Sections." Science (New York, N.Y.) 186, no. 4160 (1974): 234. https://doi.org/10.1126/science.186.4160.234.
MLA (9th ed.) CitationJr, Power PC, and Pincus HJ. "Optical Diffraction Analysis of Petrographic Thin Sections." Science (New York, N.Y.), vol. 186, no. 4160, 1974, p. 234, https://doi.org/10.1126/science.186.4160.234.
Warning: These citations may not always be 100% accurate.