Bonnell, J. T., & Bell, R. A. (1993). The gravities of K giant stars determined from [O I] and OH features. Monthly notices of the Royal Astronomical Society, 264(2), 319-333. https://doi.org/10.1093/mnras/264.2.319
Chicago Style (17th ed.) CitationBonnell, J. T., and R. A. Bell. "The Gravities of K Giant Stars Determined from [O I] and OH Features." Monthly Notices of the Royal Astronomical Society 264, no. 2 (1993): 319-333. https://doi.org/10.1093/mnras/264.2.319.
MLA (9th ed.) CitationBonnell, J. T., and R. A. Bell. "The Gravities of K Giant Stars Determined from [O I] and OH Features." Monthly Notices of the Royal Astronomical Society, vol. 264, no. 2, 1993, pp. 319-333, https://doi.org/10.1093/mnras/264.2.319.
Warning: These citations may not always be 100% accurate.