Duck, S. (1990). Personal relationships and social support. Sage.
Cita Chicago Style (17a ed.)Duck, Steve. Personal Relationships and Social Support. London [u.a.]: Sage, 1990.
Cita MLA (9a ed.)Duck, Steve. Personal Relationships and Social Support. Sage, 1990.
Precaución: Estas citas no son 100% exactas.