APA

Bradley D. C., . (1992). Geologic studies in Alaska by the US Geological Survey. : .

Chicago

Bradley Dwight C, . 1992. Geologic studies in Alaska by the US Geological Survey. : .

Harvard

Bradley D. C., . (1992). Geologic studies in Alaska by the US Geological Survey. : .

MLA

Bradley Dwight C, . Geologic studies in Alaska by the US Geological Survey. : . 1992.