APA

Plowden D., . (1974). Bridges : the spans of North America. New York: Viking Press.

Chicago

Plowden David, . 1974. Bridges : the spans of North America. New York: Viking Press.

Harvard

Plowden D., . (1974). Bridges : the spans of North America. New York: Viking Press.

MLA

Plowden David, . Bridges : the spans of North America. New York: Viking Press. 1974.