I bought this not to study for a qualification, but because I wanted to read the content. There are no markings. The red sheet that was included at the time of purchase is also included. I read it once, or rather, I only read the pages I wanted to see. ◉ If you would like to purchase multiple items, please use the "Request to buy in bulk" option. ◉ I cannot respond to price reduction requests in the comments. Please register your desired price. ◉ Shipping will be within "4-7 days", but I often ship sooner. If you have any problems with early shipping, please comment before purchasing.