Getting Permissions
If you do not do these things, you may be committing copyright infringement and/or plagiarism. An easy way to acquire reprint permissions is through the Copyright Clearance Center.
Fair Use
In some cases your use may qualify as a fair use under the guidelines in section 107 of the U.S. Copyright Code. Duquesne provides a fair use checklist you can use to document your fair use analysis.
This guide will give you a crash course in acquiring reprint permissions, and have many useful links.
If you need further help, or have further questions, please contact the Scholarly Communication Librarian.