Não informado. (1969). Occasional papers of the Farlow Herbarium of Cryptogamic Botany. Harvard University.
Chicago-referens (17:e uppl.)Não informado. Occasional Papers of the Farlow Herbarium of Cryptogamic Botany. Cambridge, Mass: Harvard University, 1969.
MLA-referens (8:e uppl.)Não informado. Occasional Papers of the Farlow Herbarium of Cryptogamic Botany. Harvard University, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.