Word citations: et. al. and last names only do not appear in any format I try

[elguapoyo]

Hello there,



I've just finished my master's thesis and have just a few days to turn it in. However, I am having trouble with my citations. At times, they appear with the author's full name and sometimes they don't. In the case of multiple authors, I don't understand how to get et. al. to appear. I've tried different formats and online searches for a solution to this. I'm hoping someone might know how to solve this with the 2010 Word format so I don't have to spend hours on end changing everything manually.