Não informado. (1969). Michigan Academician. Michigan Academy of Science, Arts and Letters.
Chicago-referens (17:e uppl.)Não informado. Michigan Academician. Ann Arbor, Mich: Michigan Academy of Science, Arts and Letters, 1969.
MLA-referens (8:e uppl.)Não informado. Michigan Academician. Michigan Academy of Science, Arts and Letters, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.