how would I cite APA (in text and in references) the ABC 20/20 Diane Sawyer movie "A Hiden America, Children of the Mountains"?
A good online source for citation information is the Purdue Online Writing Lab. From their APA citation page, http://owl.english.purdue.edu/owl/resource/560/11/, we find a single episode from a television series is cited in this format:
Writer, W. W. (Writer), & Director, D. D. (Director). (Date of publication). Title of episode [Television series episode]. In P. Producer (Producer), Series title. City, state of origin: Studio or distributor.
Since the information you supplied is not sufficient to build a full citation, I am relying on the ABC website (http://abcnews.go.com/2020/story?id=6845770&page=1) and the IMDB (http://www.imdb.com/title/tt1420777/) for further information. Where they have contradicted each other, I have given preference to the ABC website. You should proofread this citation carefully; if you have a better source of information, replace my data with yours. I do not guarantee the accuracy of this data; just the format.
Arledge, R. (Writer), Tivnan, E. (Writer), & Goodman, R. (Director). (2009, February 10). A hidden America, Children of the mountains [Television series episode]. In J. Diaz (Producer), K. Gray (Producer), & C. Weinraub (Producer), 20/20. New York, NY: ABC.
The in-text citation depends on whether it is the first time you are citing it in the text or not, and whether you’ve used the author’s name in the sentence.
First citation in text, you used the authors’ names in the sentence:
Arledge, Tivnan, and Goodman showed the horrible conditions in Central Appalachia (2009).
Subsequent citation in text, you used the authors’ names in the sentence:
Arledge et al. showed the horrible conditions in Central Appalachia (2009).
First citation in text, you have not used the authors’ names in the sentence:
The living conditions in Central Appalachia are horrible (Arledge, Tivnan, & Goodman, 2009).
Subsequent citation in text, you have not used the authors’ names in the sentence:
The living conditions in Central Appalachia are horrible (Arledge et al., 2009).
Let me know if I can be of any further help to you.