(1983). Houghton Mifflin English: Resource book level 5. Houghton Mifflin.
Cita Chicago (17th ed.)Houghton Mifflin English: Resource Book Level 5. Boston: Houghton Mifflin, 1983.
Cita MLA (9th ed.)Houghton Mifflin English: Resource Book Level 5. Houghton Mifflin, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.