APA (7th ed.) Citation

ScienceDirect (Online service), Smith, E. K., & Matsushita, S. (1962). Ionospheric sporadic E. Pergamon Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Ernest K. Smith, and Sadami Matsushita. Ionospheric Sporadic E. Oxford: Pergamon Press, 1962.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Ionospheric Sporadic E. Pergamon Press, 1962.