Bakers, R. H. (1961). An introduction to astronomy. D. Van Nostrand.
Lua i Stíl Chicago (17ú heag.)Bakers, Robert H. An Introduction to Astronomy. Princeton, NJ: D. Van Nostrand, 1961.
Lua MLA (9ú heag.)Bakers, Robert H. An Introduction to Astronomy. D. Van Nostrand, 1961.
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