Joni Mitchell recorded her own song River for her June 1971 album Blue. According to Wikipedia, is has been covered by at least 70 artists.
Grace Notes sang River in 1993 on their first album, Down Falls the Day.
Sally Barker sang River in 2010 on her, Glenn Hughes' and Debbie Cassell's Joni Mitchell tribute album, Conversation.
Josienne Clarke and Ben Walker sang River in 2015 on their album Midwinter.
Please find the lyrics for this song at Joni Mitchell's website.