Information Systems Research bug

suppressing the author led to ( 2012) citations, as we always prefixed "
" before the date. Use a " " suffix after the author instead.

Not sure if this should be handled by setting the group separator or similar.
Please see discussion at http://forums.zotero.org/discussion/27534/informationsystems-review-bug/#Comment_145024 for details.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>