Hello Hakim, Apologies for no response in this forum. I wish the moderator could play its role better. Though answering this question might be a little too late, but I hope this could help future inquiry with the same matter. The best answer to this is to seek consultation from the librarian through email or at their counter. Don't hesitate to speak in English, there should not be a problem hahaha. Here's important contact address with regards to library: safwan.jalil@ubd.edu.bn reference.library@ubd.edu.bn In addition to this, try using Perlego for more materials. You may email the library for Perlego access.