Hoyle, F. (1975). Astronomy and cosmology: A modern course. San Francisco : W H Freeman.
Lua i Stíl Chicago (17ú heag.)Hoyle, Fred. Astronomy and Cosmology: A Modern Course. San Francisco : W H Freeman, 1975.
Lua MLA (9ú heag.)Hoyle, Fred. Astronomy and Cosmology: A Modern Course. San Francisco : W H Freeman, 1975.
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