APA

Cronquist A., . (1970). New combinations in the Compositae of the Galápagos Islands. : .

Chicago

Cronquist Arthur, . 1970. New combinations in the Compositae of the Galápagos Islands. : .

Harvard

Cronquist A., . (1970). New combinations in the Compositae of the Galápagos Islands. : .

MLA

Cronquist Arthur, . New combinations in the Compositae of the Galápagos Islands. : . 1970.