APA
Hewes C. E., . (1922). Songs of the Rockies. Rocky Mountain National Park, CO: Egerton-Palmer Press.
Chicago
Hewes Charles Edwin, . 1922. Songs of the Rockies. Rocky Mountain National Park, CO: Egerton-Palmer Press.
Harvard
Hewes C. E., . (1922). Songs of the Rockies. Rocky Mountain National Park, CO: Egerton-Palmer Press.
MLA
Hewes Charles Edwin, . Songs of the Rockies. Rocky Mountain National Park, CO: Egerton-Palmer Press. 1922.