"OK, adj., int.1, n.2, and adv." OED Online. Oxford University Press, June 2021. Web. 25 July 2021.

"OK, adj., int.1, n.2, and adv." OED Online, Oxford University Press, June 2021, www.oed.com/viewdictionaryentry/Entry/130925. Accessed 25 July 2021.

"OK, adj., int.1, n.2, and adv.". OED Online. June 2021. Oxford University Press. https://www.oed.com/viewdictionaryentry/Entry/130925 (accessed July 25, 2021).