SWEET, Jay. Jazz at Smoke: Saxophonist Billy Harper Celebrates John Coltrane [online]. New Jersey Stage, 2023-01-02 [cit. 2023-02-11]. Dostupné online. (anglicky)
nytimes.com
SCHEININ, Richard. At 80, the Saxophonist Billy Harper Is Still a Towering Force [online]. The New York Times, 2023-01-16 [cit. 2023-02-11]. Dostupné online. (anglicky)
