Não informado. (1888). Bulletin of the North Carolina Agricultural Experiment Station. North Carolina State University of Raleigh.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the North Carolina Agricultural Experiment Station. Raleigh, NC: North Carolina State University of Raleigh, 1888.
MLA-referens (8:e uppl.)Não informado. Bulletin of the North Carolina Agricultural Experiment Station. North Carolina State University of Raleigh, 1888.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.