The American Psychological Association, the world's largest association of psychologists as of 2013, crafted APA style in the 1930s as a way to inform and simplify scientific writings. Though the style is most often used by academics writing in the fields of behavioral and social sciences, APA style allows authors to cite popular television series, as well.
There isn't a specific way to cite an HBO series, in particular, so you should follow the broader APA style guideline for citing a television series. Before writing a citation, there is some information you must have about the show. According to the sixth edition of the Publication Manual of the American Psychological Association, you will need to identify the producer of the series, as well as the date of broadcast or the copyright date. You will also need the title of the series in question and the city and state of origin. Finally, identify the studio behind the series. In this specific case, HBO would be listed as the studio behind the show.
Penning the Citation
Arrange the collected information in the correct citation format. Start by naming the producer of the show (last name, followed by a comma and the first name). Immediately following the name, write "Producer" in parentheses and follow that with a period. Next, list the date of broadcast or copyright in parentheses and then include a period. Then list the title of the series in italics and immediately follow it with the phrase "Television series " in square brackets. Place another period. Finally, list the city and state of origin and use a colon to separate that from the name of the studio or distributor, HBO.