Dyfyniad APA

Barnes, C. W. (1934). Earth, time and life. John Wiley and sons.

Dyfyniad Arddull Chicago

Barnes, Charles W. Earth, Time and Life. New York: John Wiley and sons, 1934.

Dyfyniad MLA

Barnes, Charles W. Earth, Time and Life. John Wiley and sons, 1934.

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