Cita APA (7th ed.)
Christensen, L. L., & Fosbury, R. A. (2006). Hubble 15 Years of Discovery. Springer New York. https://doi.org/10.1007/0-387-36082-4
Cita Chicago (17th ed.)
Christensen, Lars Lindberg, i Robert A. Fosbury. Hubble 15 Years of Discovery. New York, NY: Springer New York, 2006. https://doi.org/10.1007/0-387-36082-4.
Cita MLA (9th ed.)
Christensen, Lars Lindberg, i Robert A. Fosbury. Hubble 15 Years of Discovery. Springer New York, 2006. https://doi.org/10.1007/0-387-36082-4.
Atenció: Aquestes cites poden no estar 100% correctes.