| Title | Engagements: Understanding the Instantiation of Activity. | 
| Publication Type | Journal Article | 
| Year of Publication | 2009 | 
| Authors | González, V. M., B. Nardi, and G. Mark | 
| Journal | Information, Technology, and People | 
| Volume | 22 | 
| Number | 2 | 
| Pagination | 109-131 |