Macmillan/McGraw-Hill School Publishing. (2003). Macmillan/McGraw-Hill Social Studies. People and places. Macmillan/McGraw-Hill.
Cita Chicago (17th ed.)Macmillan/McGraw-Hill School Publishing. Macmillan/McGraw-Hill Social Studies. People and Places. New York: Macmillan/McGraw-Hill, 2003.
Cita MLA (8th ed.)Macmillan/McGraw-Hill School Publishing. Macmillan/McGraw-Hill Social Studies. People and Places. Macmillan/McGraw-Hill, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.