Vogel Library has guides for most citation styles. Below you can see which disciplines use which styles (defer to your professor):
Vogel Library's Annotated Bibliography guide will help you get started understanding, researching, writing, and formatting your annotated bibliography.
Librarians are always ready to help with this assignment and others:
Walk up - Come to the 2nd floor library Service Desk.
Phone - Call 319-352-8506 for reference questions.
Email - Send your questions to "Ask A Librarian."
Chat - Use the chat button on the library's homepage.
Consult by appointment - Set up an individual meeting using the Information Consultation form.