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refer

refer /rɪˈfɚ/ verb
refers; referred; referring
refer
/rɪˈfɚ/
verb
refers; referred; referring
Britannica Dictionary definition of REFER
[+ object]
: to send (someone or something) to a particular person or place for treatment, help, advice, etc.
usually + to

refer to

[phrasal verb]
refer to (something) : to look at or in (something) for information
refer to (something) : to have a direct connection or relationship to (something)
refer to (someone or something) : to talk about or write about (someone or something) especially briefly : to mention (someone or something) in speech or in writing
refer to (something or someone) as (something) : to call (something or someone) by (a specified name or title)