1. General social survey network items;Burt;Connections,1985
2. Predictors of foreign language gain during study abroad;Brecht,1995
3. Sociolinguistic Theory;Chambers,2009
4. Evolving threads in study abroad research;Churchill,2006
5. Study abroad: when, how long, and with what results? New data from the Russian front;Davidson;Foreign Language Annals,2010