APA (7th ed.) Citation

Olsen, J. (1967). Black is best : the riddle of Cassius Clay / by Jack Olsen: The riddle of Cassius Clay. Dell Publishing.

Chicago Style (17th ed.) Citation

Olsen, Jack. Black Is Best : The Riddle of Cassius Clay / by Jack Olsen: The Riddle of Cassius Clay. New York: Dell Publishing, 1967.

MLA (9th ed.) Citation

Olsen, Jack. Black Is Best : The Riddle of Cassius Clay / by Jack Olsen: The Riddle of Cassius Clay. Dell Publishing, 1967.

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