Should one refer to the title of an article or to the title of the magazine when the author is unknown (MLA/APA)
According to the MLA Style Manual, which is excerpted on many sites (such as the Williams College Library homepage), they recommend using a partial title as the citation.

So, in the case above, you'd probably write 


  Bassnett states that . . . ("Interview" 201).


unless you have multiple works with unknown authors whose title starts with "Interview." Then you'd need more of the title to distinguish it:


  Bassnett states that . . . ("Interview with Susan Bassnett" 201). Smith responds by claiming . . . ("Interview with Robert Smith" 12).