Certified exam...what should I be studying?

All, firstly let me apologize for asking a question that I am sure has been asked millions of times before...however, I can't seem to find a direct answer. With he Intro exam, you get a book...and the exam questions all come from the workbook. However, for the certified exam...what should I be studying? Are there specific books the exam is based on? Are we expected to know everything from everywhere? Any direction would be greatly appreciated!

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