APA

Ravenna P., . (1979). New species of Iridaceae from Galápagos and Colombia. : .

Chicago

Ravenna Pierfelice, . 1979. New species of Iridaceae from Galápagos and Colombia. : .

Harvard

Ravenna P., . (1979). New species of Iridaceae from Galápagos and Colombia. : .

MLA

Ravenna Pierfelice, . New species of Iridaceae from Galápagos and Colombia. : . 1979.