Cita APA (7th ed.)

(1983). Houghton Mifflin English: Resource book level 6. Houghton Mifflin Co..

Cita Chicago (17th ed.)

Houghton Mifflin English: Resource Book Level 6. Boston: Houghton Mifflin Co., 1983.

Cita MLA (9th ed.)

Houghton Mifflin English: Resource Book Level 6. Houghton Mifflin Co., 1983.