Não informado. (1977). Epiegram equipment. Educational Products Information Exchange Institute.
Chicago-referens (17:e uppl.)Não informado. Epiegram Equipment. New York: Educational Products Information Exchange Institute, 1977.
MLA-referens (8:e uppl.)Não informado. Epiegram Equipment. Educational Products Information Exchange Institute, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.