Gaya APA
Hasse, J, E.
(1985).
Ragtime: Its History, Composers, and Music
.
London:
the macmillan press ltd.
Gaya MLA
Hasse, John, Edward.
"Ragtime: Its History, Composers, and Music".
London:
the macmillan press ltd,
1985.
Buku Referensi.