See the Business Culture website from the International Trade Administration including their Country Commercial Guide for country-specific business culture information. 

Search ABI/Inform and Businesss Source Complete for articles about cultural differences relating to international business.

• Search by keyword, for example: cultural differences

Country Insights from Canada's Centre for Intercultural Learning provides general and business-related cultural information. 

Search the Franklin catalog for keywords such as international business culture or keyword strings such as cultural differences AND international business.