Verb
- Present participle of sign up.
signing-up
English Wiktionary. Available under CC-BY-SA license.
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"signing-up." YourDictionary, n.d. Web. 21 January 2019. <https://www.yourdictionary.com/signing-up>.
APA Style
signing-up. (n.d.). Retrieved January 21st, 2019, from https://www.yourdictionary.com/signing-up
