The printing data processing system searches for reference indication (i.e., link sources) in the received ML source data, and adds the page information for the linked objects to the ML source data. The page number on which the linked object is printed is printed after the printing of each link source term included when a ML source file, such as a home page. Consequently, when a home page is printed, for example, the user can easily arrive at the linked object from the link source in the printed document while the home page layout on the personal computer is kept intact.