Martin, C. (1973). How human can you get? Inter Varsity.
Cita Chicago (17th ed.)Martin, Charles. How Human Can You Get? Illinois: Inter Varsity, 1973.
Cita MLA (9th ed.)Martin, Charles. How Human Can You Get? Inter Varsity, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.