If you ask an English teacher if Wikipedia is a good source they will most likely inform you that the APA does not consider to be valid. Apparently Candian Customs thinks differently.
As a professional speaker traveling across the border I sometimes get sent to immigration for further questioning after customs cannot wrap their head around the idea of a professional speaker. One occasion I was delayed for close to 3 hours before finally being allowed to enter. Recently I was traveling to St John NB for a few days to speak at a International Round Square Youth conference. Upon landing in Toronto I had to go through customs and after explaining what I was there for was sent along to immigration for further review.
After approaching the young women in immigration I handed her my passport and began to answer her questions about why I was heading into Canada. She seemed a bit perplexed and continued to ask about my speaking, “What do you speak about? How do you get your shows? Who do you speak to?”
I continued to explain and went as far to say I had a video on the Internet that had gone viral and that provided for lots of PR etc. What I did not know is that Canada has apparently adopted the policy to Google the name of anyone they are questioning to see what results pop up.
One search result later I was greeted with this, “Oh! You have a Wikipedia page! Here you go. Come on in!” Wikipedia might not be able to serve as a source for your dissertation but at least Canada considers it safe.