APA

Hope P. L. W. H., . (1991). Sperm whales off the Galápagos Islands from 1830-50 and comparisons with modern studies. : .

Chicago

Hope P L Whitehead H, . 1991. Sperm whales off the Galápagos Islands from 1830-50 and comparisons with modern studies. : .

Harvard

Hope P. L. W. H., . (1991). Sperm whales off the Galápagos Islands from 1830-50 and comparisons with modern studies. : .

MLA

Hope P L Whitehead H, . Sperm whales off the Galápagos Islands from 1830-50 and comparisons with modern studies. : . 1991.