Cita APA (7th ed.)
Padilla, M. J., Miaoulis, I., & Cyr, M. (2005). Prentice hall earth science. Pearson/ Perntice-Halll.
Cita Chicago (17th ed.)
Padilla, Michael J., Ioannis Miaoulis, i Martha Cyr. Prentice Hall Earth Science. New Jersey: Pearson/ Perntice-Halll, 2005.
Cita MLA (9th ed.)
Padilla, Michael J., et al. Prentice Hall Earth Science. Pearson/ Perntice-Halll, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.