SNOW, T. P. (1985). The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company.
Lua i Stíl Chicago (17ú heag.)SNOW, Theodore P. The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company, 1985.
Lua MLA (8ú heag.)SNOW, Theodore P. The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company, 1985.
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