Led Zeppelin's heavy interpretation of "Bring It On Home" appears on Led Zeppelin II. "Bring It On Home" was originally written by Willie Dixon and recorded by Sonny Boy Williamson in 1963. As the liner notes for Led Astray point out, Led Zeppelin's version of this song follows Sonny Boy Williamson's recording. Robert Plant is clearly trying to imitate Sonny Boy Williamson's vocal style in the opening and closing sections of this track. In the All-Music Guide Cub Koda states, "This arrangementright down to the short harmonica punctuationswas copied word for word and note for note by Led Zeppelin, who added a heavy rock instrumental interlude in the middle and then gleefully took full writing credit for it."
[1] In 1972, ARC music sued Led Zeppelin, claiming that they had plagiarized Willie Dixon and a settlement was reached out of court.
[2] The songwriting credits are now listed as Jimmy Page, Robert Plant, Willie Dixon.
Recommended Listening
 
Sonny Boy Williamson - His Best
 
Willie Dixon - The Chess Box
Compilations of Original Versions
"Bring It On Home" by Sonny Boy Williamson is included on Led Astray and Zeppelin Classics. A version by Baba Blues is included on Led Zeppelin's Sources of Inspiration.