Here are some common features you should try and find before citing a webpage in APA style.
If there is an author listed:
If there is no author:
Polymers and Coatings (MST-7), 2014. Los Alamos National Laboratory Web site. http://www.lanl.gov/mst/mst7/index.shtml (accessed Dec 10, 2014).
What Do Manufacturing Engineers Do?, 2014. Oregon State University College of Engineering Website. http://mime.oregonstate.edu/academics/undergrad/mfge/job-descrip (accessed Dec 10, 2014).