Bortz, F. (2005). Beyond jupiter: The story of planetary astronomer heidi hammel (First edition.). Joseph Henry Press.
Cita Chicago (17th ed.)Bortz, Fred. Beyond Jupiter: The Story of Planetary Astronomer Heidi Hammel. First edition. Washington, D. C.: Joseph Henry Press, 2005.
Cita MLA (9th ed.)Bortz, Fred. Beyond Jupiter: The Story of Planetary Astronomer Heidi Hammel. First edition. Joseph Henry Press, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.