APA

Black M, . (1976). Galápagos National Park, problems and solutions. : .

Chicago

Black M, . 1976. Galápagos National Park, problems and solutions. : .

Harvard

Black M, . (1976). Galápagos National Park, problems and solutions. : .

MLA

Black M, . Galápagos National Park, problems and solutions. : . 1976.