Cita APA

(1982). World English: Teacher's book. Washington, DC.: United states Department of state.

Chicago Style Citation

World English: Teacher's Book. Washington, DC.: United states Department of state, 1982.

Cita MLA

World English: Teacher's Book. Washington, DC.: United states Department of state, 1982.

Atenció: Aquestes cites poden no estar 100% correctes.