APA aipamena

SAWKINS, F. J. A text in physical the evolving earth#Frederick J. Sawkins et.1l. Macmillan Publ.

Chicago Style aipamena

SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.

MLA aipamena

SAWKINS, Frederick J. A Text in Physical the Evolving Earth#Frederick J. Sawkins Et.1l. Macmillan Publ.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.