APA
Hill N., . (1965). The master-key to riches. new york: ballantine books.
Chicago
Hill Napoleon, . 1965. The master-key to riches. new york: ballantine books.
Harvard
Hill N., . (1965). The master-key to riches. new york: ballantine books.
MLA
Hill Napoleon, . The master-key to riches. new york: ballantine books. 1965.