Não informado. (1932). Field and laboratory. Southern Methodist University.
Chicago-referens (17:e uppl.)Não informado. Field and Laboratory. Dallas, Tex: Southern Methodist University, 1932.
MLA-referens (8:e uppl.)Não informado. Field and Laboratory. Southern Methodist University, 1932.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.