Hartley, K. (1997). Double Bass Solo: Bd.1 / selected and adapted by Keith Hartley. Oxford Univ. Press.
Chicago-referens (17:e uppl.)Hartley, Keith. Double Bass Solo: Bd.1 / Selected and Adapted by Keith Hartley. Oxford [u.a.]: Oxford Univ. Press, 1997.
MLA-referens (8:e uppl.)Hartley, Keith. Double Bass Solo: Bd.1 / Selected and Adapted by Keith Hartley. Oxford Univ. Press, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.