APA aipamena

Avakian Robert W. (1997). Earth Science. American: McGraw-Hill.

Chicago Style aipamena

Avakian Robert W. Earth Science. American: McGraw-Hill, 1997.

MLA aipamena

Avakian Robert W. Earth Science. American: McGraw-Hill, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.