Samelson, W. (1974). English as a second language. Phase One: Let´s converse. Reston Publishing.
Chicago-referens (17:e uppl.)Samelson, William. English as a Second Language. Phase One: Let´s Converse. Virginia, Estados Unidos: Reston Publishing, 1974.
MLA-referens (9:e uppl.)Samelson, William. English as a Second Language. Phase One: Let´s Converse. Reston Publishing, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.