SAWKINS, F. J. A text in physical the evolving earth#Frederick J. Sawkins et.1l. Macmillan Publ.
Cita Chicago Style (17a ed.)SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.
Cita MLA (8a ed.)SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.
Precaución: Estas citas no son 100% exactas.