APA

Sundevall C. J., . (1871). On the birds from the Galápagos Islands. : .

Chicago

Sundevall C J, . 1871. On the birds from the Galápagos Islands. : .

Harvard

Sundevall C. J., . (1871). On the birds from the Galápagos Islands. : .

MLA

Sundevall C J, . On the birds from the Galápagos Islands. : . 1871.