APA Citation

Kaufmann, W. J. (1989). Discovering the universe / William J. Kaufmann (2.). Estados Unidos de America : Freeman and Company.

Chicago Style Citation

Kaufmann, William J. Discovering the Universe / William J. Kaufmann. 2. Estados Unidos de America : Freeman and Company, 1989.

MLA Citation

Kaufmann, William J. Discovering the Universe / William J. Kaufmann. 2. Estados Unidos de America : Freeman and Company, 1989.

Warning: These citations may not always be 100% accurate.