Sage. Tilly, Charles. (2005). Identities, Boundaries, and Social Ties. Boulder, CO: Paradigm press. Valente, Thomas. (1995). Network Models of the Diffusion of Innovation. Cresskill, NJ: Hampton Press. Wasserman, Stanley, & Faust, Katherine. (1994). Social Networks Analysis: Methods and Applications. Cambridge: Cambridge University Press. Watkins, Susan Cott. (2003). "Social Networks." Pp. 909–910 in Encyclopedia of Population. rev. ed. Edited by Paul Demeny and Geoffrey McNicoll. New York: Macmillan Reference. Watts, Duncan. (2004). Six Degrees: The Science of a Connected Age. W. W. Norton & Company. Wellman, Barry (1999). Networks in the Global Village. Boulder, CO: Westview Press. Wellman, Barry and Berkowitz, S.D. (1988). Social Structures: A Network Approach. Cambridge: Cambridge University Press. {{cite document|author=Weng, M.|year=2007|title=A Multimedia Social-Networking Community for Mobile Devices Interactive Telecommunications Program|publisher=Tisch School of the Arts/ New York University|citeseerx=10.1.1.538.7640}} White, Harrison, Scott Boorman and Ronald Breiger. 1976. "Social Structure from Multiple Networks: I Blockmodels of Roles and Positions." American Journal of Sociology 81: 730–80. External links International Network for Social Network Analysis (INSNA) list of software packages and libraries: Computer Programs for Social Network Analysis page. 2010 : A comparative study of social network analysis tools by Combe, Largeron, Egyed-Zsigmond and Géry: Social networks Comparisons of mathematical software Data analysis software Social network analysis