(1999). Atoc 1060: Our changing environment. Pearson.
Cita Chicago (17th ed.)Atoc 1060: Our Changing Environment. Boulder: Pearson, 1999.
Cita MLA (9th ed.)Atoc 1060: Our Changing Environment. Pearson, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.