"safe, adj. (and int.)." OED Online. Oxford University Press, December 2021. Web. 3 December 2021.

"safe, adj. (and int.)." OED Online, Oxford University Press, December 2021, www.oed.com/viewdictionaryentry/Entry/169673. Accessed 3 December 2021.

"safe, adj. (and int.)". OED Online. December 2021. Oxford University Press. https://www.oed.com/viewdictionaryentry/Entry/169673 (accessed December 03, 2021).