Wade, N. (1998). DNA breakthrough offers hope for syphilis vaccine. Today.
Cita Chicago (17th ed.)Wade, Nicholas. "DNA Breakthrough Offers Hope for Syphilis Vaccine." Today 1998.
Cita MLA (9th ed.)Wade, Nicholas. "DNA Breakthrough Offers Hope for Syphilis Vaccine." Today, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.