URL should have been removed! Indicating source makes sense. APA is probably better!
APA is definitely easier, but I've always thought it was less precise. I did most of my undergrad using MLA and all my grad work in APA. With APA, you don't even need to quote directly, just throw the parentheses around a name and year. I teach my students both, since they will end up using both in college, but I emphasize MLA because it's more elaborate and for some more difficult to get right. If the kids can master MLA, APA is a breeze. I liken it to making kids practice running a mile when I just want them to be able to run a half.