APA

Chadwick W. W., Howard K. A., . (1991). The pattern of circumferential and radial eruptive fissures on the volcanoes of Fernandina and Isabela Islands, Galapagos. : .

Chicago

Chadwick William W, Howard Keith A, . 1991. The pattern of circumferential and radial eruptive fissures on the volcanoes of Fernandina and Isabela Islands, Galapagos. : .

Harvard

Chadwick W. W., Howard K. A., . (1991). The pattern of circumferential and radial eruptive fissures on the volcanoes of Fernandina and Isabela Islands, Galapagos. : .

MLA

Chadwick William W, Howard Keith A, . The pattern of circumferential and radial eruptive fissures on the volcanoes of Fernandina and Isabela Islands, Galapagos. : . 1991.