Trying to find out how to cite a dissertation in Word (2010) turned out to be a matter similar to finding anything small in a haystack. Fortunately I got in touch with the Word-expert at Åbo Akademi University, and she told me how to manage this dilemma. When you manage your sources, choose "Report" and then fill in the necessary information. Word will tell you to write the thesis after "Type", but this does not work. Instead, write thesis before the name of the city, and voilà you have your source ready.