@inbook{SAS2015,
author = {SAS, Institute Inc.},
title= {The X12 Procedure},
year = {2015},
URL = {http://support.sas.com/documentation/cdl/en/etsug/60372/HTML/default/viewer.htm#x12_toc.htm},
booktitle = {SAS/ETS(R) 9.2 User's Guide},
address = {Cary, NC},
publisher = {SAS Institute Inc., 2000},
}