APA is the recommended citation style for the social sciences, including business disciplines.
IBISWorld: (cite the report used)
Lerman, S. (2016, September). IBISWorld industry
report 61111a. Public schools in the US. Retrieved
from IBISWorld database.
Simmons Insights: (cite the study/dataset used)
Simmons Research. (2014). Spring 2014 NHCS adult study
12-month [Data file]. Retrieved from Simmons
Insights database.
Simmons Research. (2015). Spring 2015 SimmonsLOCAL
(flexible markets) [Data file]. Retrieved from
Simmons Insights database.
ReferenceUSA U.S. Businesses: (cite the database record used)
Infogroup. (2016). Kate's on State [Database record].
Retrieved from R
eferenceUSA U.S. Businessesdatabase.
Many more APA citation examples are available.