Franklin

MLA

Sammis, Charles G, and Thomas L Henyey. Geophysics. Orlando: Academic Press, 1987.

APA

Sammis, C. G, & Henyey, T. L. (1987). Geophysics. Orlando: Academic Press.

Chicago

Sammis, Charles G., and Thomas L Henyey. Geophysics. Orlando: Academic Press, 1987.