(1993). Center for Research on Social Reality [Spain] Survey, February 1991 The Use of Time / Centro de Investigaciones Sobre la Realidad Social (CIRES) [electronic resource].
Cita Chicago (17th ed.)Center for Research on Social Reality [Spain] Survey, February 1991 The Use of Time / Centro De Investigaciones Sobre La Realidad Social (CIRES) [electronic Resource]. 1993.
Cita MLA (9th ed.)Center for Research on Social Reality [Spain] Survey, February 1991 The Use of Time / Centro De Investigaciones Sobre La Realidad Social (CIRES) [electronic Resource]. 1993.
Atenció: Aquestes cites poden no estar 100% correctes.