Cita APA (7th ed.)
HOWARD, J. (1998). PREVENTION TRENDS IN THE 1990S.
Cita Chicago (17th ed.)
HOWARD, J. PREVENTION TRENDS IN THE 1990S. 1998.
Cita MLA (9th ed.)
HOWARD, J. PREVENTION TRENDS IN THE 1990S. 1998.
Atenció: Aquestes cites poden no estar 100% correctes.