Stix, G. A toxin against pain. (article). 4 p70-75 Apr 2005.
Cita Chicago (17th ed.)Stix, Gary. A Toxin Against Pain. (article). v.292: 4 p70-75 Apr 2005.
Cita MLA (9th ed.)Stix, Gary. A Toxin Against Pain. (article). 4 p70-75 Apr 2005.
Atenció: Aquestes cites poden no estar 100% correctes.