APA

Grierson F., . (1966). The valley of shadows. New York: Harper and Row.

Chicago

Grierson Francis, . 1966. The valley of shadows. New York: Harper and Row.

Harvard

Grierson F., . (1966). The valley of shadows. New York: Harper and Row.

MLA

Grierson Francis, . The valley of shadows. New York: Harper and Row. 1966.