参考 さんこうになる
sankōni naru

Godan Verb (ru)
Expression

1. to serve as a reference; to provide useful information; to be helpful; to be informative; to be instructive

えう しゃのアニュアルレポートは参考 さんこうになる。
eishano anyuarurepōtowa sankōni naru.
A Ltd.'s annual report is worth having a look at.