Cita APA (7th ed.)
WU, Z., & POLLARD, M. (1999). SOCIAL SUPPORT AMONG UNMARRIED CHILDLESS ELDERLY PERSONS.
Cita Chicago (17th ed.)
WU, Z., i M.S POLLARD. SOCIAL SUPPORT AMONG UNMARRIED CHILDLESS ELDERLY PERSONS. 1999.
Cita MLA (9th ed.)
WU, Z., i M.S POLLARD. SOCIAL SUPPORT AMONG UNMARRIED CHILDLESS ELDERLY PERSONS. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.