United States. Department of State. English teaching forum. U.S. Dept. of State : Supt. of Docs., U.S. G.P.O. [distributor].
Chicago-referens (17:e uppl.)United States. Department of State. English Teaching Forum. Washington, D.C.: U.S. Dept. of State : Supt. of Docs., U.S. G.P.O. [distributor].
MLA-referens (9:e uppl.)United States. Department of State. English Teaching Forum. U.S. Dept. of State : Supt. of Docs., U.S. G.P.O. [distributor].
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.