Cita APA (7th ed.)
Roos, M. (2015). Introduction to cosmology (Fourth edition.). John Wiley & Sons.
Cita Chicago (17th ed.)
Roos, Matts. Introduction to Cosmology. Fourth edition. West Sussex, England: John Wiley & Sons, 2015.
Cita MLA (9th ed.)
Roos, Matts. Introduction to Cosmology. Fourth edition. John Wiley & Sons, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.