Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.