Cita APA (7th ed.)
Jeanner Jan [et-al]. (2005). Earth Science. Pearson Prentic Hall.
Cita Chicago (17th ed.)
Jeanner Jan [et-al]. Earth Science. New Jersey: Pearson Prentic Hall, 2005.
Cita MLA (9th ed.)
Jeanner Jan [et-al]. Earth Science. Pearson Prentic Hall, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.