APA

Weber W. A., . (1986). The lichen flora of the Galápagos Islands, Ecuador. : .

Chicago

Weber W A, . 1986. The lichen flora of the Galápagos Islands, Ecuador. : .

Harvard

Weber W. A., . (1986). The lichen flora of the Galápagos Islands, Ecuador. : .

MLA

Weber W A, . The lichen flora of the Galápagos Islands, Ecuador. : . 1986.