appeal toUsed with a person or group to mean appealing to them. In legal contexts, 訴える can mean sue; に訴えられる means be sued by someone, and 訴えてやる means I'll sue you.
JA: 彼は人々の良心に訴えて、寄付を呼びかけた。
EN: He appealed to people's conscience and called for donations.