What reference style is this?
The style seems to be a slight variation to Chicago notes style (as opposed to the bibliography style). In strict Chicago the journal article would be:


  Anne Nguyen, "Cultural and Social Attitudes Towards Mental Illness in Ho Chi Minh City, Vietnam," Stanford University Research Journal (2003): 27-31.


With the key differences being a comma instead of a period after the author, quotes around the title followed by a comma and parenthesis around the year.

Similarly for the book it would be:


  Richard Keller, Colonial Madness: Psychiatry in French North Africa. (Chicago: University of Chicago Press, 2007), 89.


with a comma instead of a period after the author and the press and year in parenthesis.