APA

Dunbar J. . H., . (1941). The Rock - Pictures of Lower Nubia. Cairo: Government Press.

Chicago

Dunbar J H, . 1941. The Rock - Pictures of Lower Nubia. Cairo: Government Press.

Harvard

Dunbar J. . H., . (1941). The Rock - Pictures of Lower Nubia. Cairo: Government Press.

MLA

Dunbar J H, . The Rock - Pictures of Lower Nubia. Cairo: Government Press. 1941.