Cita APA (7th ed.)
Liddle, A. R., & Loveday, J. The Oxford Companion to Cosmology. Oxford University.
Cita Chicago (17th ed.)
Liddle, Andrew R., i Jon Loveday. The Oxford Companion to Cosmology. Oxford, Inglaterra: Oxford University.
Cita MLA (9th ed.)
Liddle, Andrew R., i Jon Loveday. The Oxford Companion to Cosmology. Oxford University.
Atenció: Aquestes cites poden no estar 100% correctes.