APA (7th ed.) Citation

Carnegie, D. (1959). Lincoln, the unknown. Dale Carnegie and Associates.

Chicago Style (17th ed.) Citation

Carnegie, Dale. Lincoln, the Unknown. New York: Dale Carnegie and Associates, 1959.

MLA (9th ed.) Citation

Carnegie, Dale. Lincoln, the Unknown. Dale Carnegie and Associates, 1959.

Warning: These citations may not always be 100% accurate.