Lee R Kump. (2016). Earth System (3rd.). Pearson.
Chicago Style aipamenaLee R Kump. Earth System. 3rd. Noida: Pearson, 2016.
MLA aipamenaLee R Kump. Earth System. 3rd. Pearson, 2016.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Lee R Kump. (2016). Earth System (3rd.). Pearson.
Chicago Style aipamenaLee R Kump. Earth System. 3rd. Noida: Pearson, 2016.
MLA aipamenaLee R Kump. Earth System. 3rd. Pearson, 2016.