Discovering astronomy /
R. Robert Robbins, William H. Jefferys.

APA Citation

Robbins, R. Robert (Ralph Robert)., Jefferys, W. H. (1988). Discovering astronomy. 2nd ed. New York: Wiley.

MLA Citation

Robbins, R. Robert (Ralph Robert), 1938-, and William H Jefferys. Discovering Astronomy. 2nd ed. New York: Wiley, 1988.

Warning: These citations may not always be complete (especially for serials).