Moulton, F. R. (1923). Descriptive astronomy: An elementary exposition of the facts, principles, and theories of astronomical science. American Mathematical Society.
Lua i Stíl Chicago (17ú heag.)Moulton, Forest Ray. Descriptive Astronomy: An Elementary Exposition of the Facts, Principles, and Theories of Astronomical Science. Chicago: American Mathematical Society, 1923.
Lua MLA (9ú heag.)Moulton, Forest Ray. Descriptive Astronomy: An Elementary Exposition of the Facts, Principles, and Theories of Astronomical Science. American Mathematical Society, 1923.
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