APA

Silverstone Sopkin P. A., .Dicranopygium callithrix (Cyclanthaceae), a new species from the Cauca Valley, Colombia. : .

Chicago

Silverstone Sopkin Philip A, .Dicranopygium callithrix (Cyclanthaceae), a new species from the Cauca Valley, Colombia. : .

Harvard

Silverstone Sopkin P. A., .Dicranopygium callithrix (Cyclanthaceae), a new species from the Cauca Valley, Colombia. : .

MLA

Silverstone Sopkin Philip A, .: . .