APA Style

Kaufmann, William J.. (1990). Discovering the universe (2nd ed). USA: W.H.Freeman.

Chicago Style

Kaufmann, William J.. Discovering the universe. 2nd ed USA: W.H.Freeman, 1990. Textbook.

MLA Style

Kaufmann, William J.. Discovering the universe. 2nd ed USA: W.H.Freeman, 1990. Textbook.

Turabian Style

Kaufmann, William J.. Discovering the universe. 2nd ed USA: W.H.Freeman, 1990. Textbook.