Martin, C. (1973). How human can you get? Inter Varsity.
Chicago Style (17th ed.) ZitazioaMartin, Charles. How Human Can You Get? Illinois: Inter Varsity, 1973.
MLA (9th ed.) ZitazioaMartin, Charles. How Human Can You Get? Inter Varsity, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.