Não informado. (1990). Journal of the Helminthological Society of Washington. Helminthological Society of Washington.
Chicago-referens (17:e uppl.)Não informado. Journal of the Helminthological Society of Washington. Lawrence, Kan: Helminthological Society of Washington, 1990.
MLA-referens (8:e uppl.)Não informado. Journal of the Helminthological Society of Washington. Helminthological Society of Washington, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.