Struve, O. (1959). Elementary Astronomy. Oxford University Press, Inc..
Cita Chicago Style (17a ed.)Struve, Otto. Elementary Astronomy. New York: Oxford University Press, Inc., 1959.
Cita MLA (9a ed.)Struve, Otto. Elementary Astronomy. Oxford University Press, Inc., 1959.
Precaución: Estas citas no son 100% exactas.