Cita APA (7a ed.)
NYHAN, W. (1990). RESEARCH CHALLENGES AND OPPORTUNITIES IN THE NEXT QUARTER CENTURY. EN: UNDERSTA-NDING MENTAL RETARDATION. PAUL H.BROOKES.
Cita Chicago Style (17a ed.)
NYHAN, W.L. RESEARCH CHALLENGES AND OPPORTUNITIES IN THE NEXT QUARTER CENTURY. EN: UNDERSTA-NDING MENTAL RETARDATION. Londres: PAUL H.BROOKES, 1990.
Cita MLA (9a ed.)
NYHAN, W.L. RESEARCH CHALLENGES AND OPPORTUNITIES IN THE NEXT QUARTER CENTURY. EN: UNDERSTA-NDING MENTAL RETARDATION. PAUL H.BROOKES, 1990.
Precaución: Estas citas no son 100% exactas.