APA

Whitehead H., Hope P. L., . (1991). Sperm whalers off the Galápagos Islands and in the western north Pacific, 1830-1850. : .

Chicago

Whitehead Hal, Hope Patricia L, . 1991. Sperm whalers off the Galápagos Islands and in the western north Pacific, 1830-1850. : .

Harvard

Whitehead H., Hope P. L., . (1991). Sperm whalers off the Galápagos Islands and in the western north Pacific, 1830-1850. : .

MLA

Whitehead Hal, Hope Patricia L, . Sperm whalers off the Galápagos Islands and in the western north Pacific, 1830-1850. : . 1991.