"mother, n.1 (and int.)." OED Online. Oxford University Press, June 2020. Web. 5 June 2020.

"mother, n.1 (and int.)." OED Online, Oxford University Press, June 2020, oed.com/viewdictionaryentry/Entry/122640. Accessed 5 June 2020.

"mother, n.1 (and int.)". OED Online. June 2020. Oxford University Press. https://oed.com/viewdictionaryentry/Entry/122640 (accessed June 05, 2020).