APA is becoming more often used in the engineering classes as a citation style.
Texas Tech has a great guide for the APA Style guide located here.
The biggest thing to remember about citations is that they are based on a pattern. The second biggest thing is that the citation generators, either through the University Libraries or other places will not always give you the correct information. So you should follow the pattern of the citation style and check the ones you copy and paste from the databases against the examples on our pages or within the APA style guide.