APA (7th ed.) Citation

Neff, C. A. (1990). Finding the distance between two circles in three-dimensional space. IBM Journal of Research & Development, 34, 770. https://doi.org/10.1147/rd.345.0770

Chicago Style (17th ed.) Citation

Neff, C. A. "Finding the Distance Between Two Circles in Three-dimensional Space." IBM Journal of Research & Development 34 (1990): 770. https://doi.org/10.1147/rd.345.0770.

MLA (9th ed.) Citation

Neff, C. A. "Finding the Distance Between Two Circles in Three-dimensional Space." IBM Journal of Research & Development, vol. 34, 1990, p. 770, https://doi.org/10.1147/rd.345.0770.