(ASA Style Guide 2014 section 5.3.7 p. 85)
The (Association) mentioned the (subject) on its (social media site) page.¹
The American Sociological Association mentioned the social context of the show on its Facebook page.¹
¹Individual of Organization's Social media page, accessed Month date, year, URL.
¹American Sociological Association's Facebook page, accessed July 6, 2017, https://l.facebook.com/l.php?u=https%3A%2F%2Fcontexts.org%2Fblog%2F13-reasons-why%2F&h=ATPkvZw1lWhBhg8s_Y-lssoiYpC6QAoTkwZmNxPI_z8XmJfpTcd3HuNtJJuDjyp8qryKUZ8GQBYHsU7-QJ91dyQgduyaHNh1tJUXs4FI8AgYAFeqiiC3WYZwDQ&s=1&enc=AZNb9SWuOmGFgEQYAPfvjKXAXQWOKr_nC3FTS_6T8IL9X1bx8vjHOwMuLsSK2m-UFO2yWGBIrd8ho2k9cZS8CoC6.
Social media posts are not included in the References section at the end of the paper, so they only receive an in-text citation with a superscripted number for the note, and then a footnote at the bottom of the page with the full footnote citation. The models that are given are for any social media platform, including Twitter, Facebook, Instagram.