Author, A. A. (publication date). Web page title. Retrieved Month day, year, from Web page address
Web sites often do not include as much information as called for in the APA guidelines. In such cases, always include as much information as possible and follow APA guidelines as closely as possible. You should talk to your professors about how they would like you to apply APA guidelines for Web documents in a course.
Web page without an author:
Title of Web page. (Publication Date). Retrieved Month day, year, from Web page address
What does the APA web site say about citing web sites?