Communication studies and Business-related databases where you can find information about communication practices in other countries and cultures. Use them to find articles published in scholarly journals and other media sources including newspapers and magazines.
Use these scholarly encyclopedias and books as a place to start researching your country or culture. Many of articles in the reference sources also have lists of "Related Reading" that will very likely be relevant to your research. All books marked (REF) are in the Reference Collection on the 1st floor of Hamersly.
To find more books like these in the library catalog, try searching for your the name of your country, culture, continent + key terms such as "communication practices" "intercultural communication" "etiquette" "manners and customs", etc.