Copyrights do expire. Works eventually enter the public domain and may be freely used. Current laws extend copyright protection for the life of the author plus 70 years. Laws have changed over the years, so you would need to find what law was in effect when a work was created to determine if that work is still protected.
This contents of the Online IamInfoSMART may be reused with attribution. Please copy the following into new works based on the IamInfoSMART. The Online IamInfoSMART by the DLSU Libraries is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. Based on a work at guides.library.uwm.edu, Pot of Gold Information Literacy Tutorial, Tutorial for Info Power, UC Santa Cruz University Library.