I have some definitions and a table in a book. I'd like to insert this directly into my assignment.  The definitions and table are, however, taken from another named source.. But I can't source the original document online. Therefore I don't really have any idea whether it's been manipulated by the book author or not.  Do I reference the author/book, even though it's taken from another source OR do I reference the original source, even though I have no way of knowing if it's true to the original?   It's a tricky one to explain but maybe someone will understand me?