APA

Hills T. L., . (1959). The St. Lawrence Seaway. New York: Praeger.

Chicago

Hills Theo L, . 1959. The St. Lawrence Seaway. New York: Praeger.

Harvard

Hills T. L., . (1959). The St. Lawrence Seaway. New York: Praeger.

MLA

Hills Theo L, . The St. Lawrence Seaway. New York: Praeger. 1959.