APA (7th ed.) Citation

Shu, F. H. (1982). The physical universe: An introduction to astronomy. University Science Books.

Chicago Style (17th ed.) Citation

Shu, Frank H. The Physical Universe: An Introduction to Astronomy. Mill Valley, Calif: University Science Books, 1982.

MLA (9th ed.) Citation

Shu, Frank H. The Physical Universe: An Introduction to Astronomy. University Science Books, 1982.