@incollection{ethnographic,
author = {Blomberg, Jeanette and Burrell, Mark and Guest, Greg},
chapter = {An ethnographic approach to design},
title = {The human-computer interaction handbook},
editor = {Jacko, Julie A. and Sears, Andrew},
year = {2003},
isbn = {0-8058-3838-4},
pages = {964--986},
numpages = {23},
url = {http://dl.acm.org/citation.cfm?id=772072.772133},
acmid = {772133},
publisher = {L. Erlbaum Associates Inc.},
address = {Hillsdale, NJ, USA},
}
$$
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$$