Liu, Z. (2008). Paper to digital: Documents in the information age. Libraries Unlimited.
Citazione stile Chigago Style (17a edizione)Liu, Ziming. Paper to Digital: Documents in the Information Age. Westport, Conn: Libraries Unlimited, 2008.
Citatione MLA (9a ed.)Liu, Ziming. Paper to Digital: Documents in the Information Age. Libraries Unlimited, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.