APA (7th ed.) Citation

ScienceDirect (Online service), Beynon, W. J. G., & Minnis, C. M. (1961). Tables of IGY monthly median ionospheric data. Pergamon Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), W. J. G. Beynon, and C. M. Minnis. Tables of IGY Monthly Median Ionospheric Data. Oxford: Pergamon Press, 1961.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Tables of IGY Monthly Median Ionospheric Data. Pergamon Press, 1961.