Discovering astronomy /
William H. Jefferys, R. Robert Robbins.
APA Citation
Jefferys, W. H., Robbins, R. Robert (Ralph Robert). (1981). Discovering astronomy. New York: Wiley.
MLA Citation
Jefferys, William H, and R. Robert (Ralph Robert) Robbins. Discovering Astronomy. New York: Wiley, 1981.
Warning: These citations may not always be complete (especially for serials).