Degenne, Alain, author
Introducing social networks
Sage, 1999
 Buku Teks
Handbook of optimization in complex networks: communication and social networks
edited by My T. Thai, Panos M. Pardalos
Springer, 2012
 eBooks
Virtual communities, social networks and collaboration
Athina A. Lazakidou, editor
[Springer, ], 2012
 eBooks
Burns, Eveline M.
The American social security system
Houghton Miffiln, 1949
 Buku Teks
Departemen of social security
Australian Goverment Publishing Service, 1993
 Buku Teks
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