APA

Patterson R. H., . (1976). Directory of American book specialists: sources for antiquarian and out-of-print titles. New York: Continental.

Chicago

Patterson R H, . 1976. Directory of American book specialists: sources for antiquarian and out-of-print titles. New York: Continental.

Harvard

Patterson R. H., . (1976). Directory of American book specialists: sources for antiquarian and out-of-print titles. New York: Continental.

MLA

Patterson R H, . Directory of American book specialists: sources for antiquarian and out-of-print titles. New York: Continental. 1976.