Information Systems Research: (eds.) -> eds.

According to Author-Year-Bib-Sample.pdf in the style guide at
https://www.informs.org/content/download/16995/187195/file/ISR-template.zip
editor label is not surrounded in parenthesis for book chapters and
conferences, and has not succeeding comma.

Example from the style guide:
Cachon, G. P. 2003. Supply chain coordination with contracts.
S. Graves, T. de Kok, eds. Handbook of Operations Research
and Management Science: Supply Chain Management. Elsevier,
Amsterdam, The Netherlands.