APA ציטוט

Gale Group & Hockey, T. A. (2007). The biographical encyclopedia of astronomers. Springer.

Chicago Style (17th ed.) Citation

Gale Group and Thomas A. Hockey. The Biographical Encyclopedia of Astronomers. New York, N.Y: Springer, 2007.

ציטוט MLA

Gale Group and Thomas A. Hockey. The Biographical Encyclopedia of Astronomers. Springer, 2007.