APA-referens (7:e uppl.)

Purcell, H., & Keil, K. (1991). A trio of catches: 3- part, SAB and piano. Thomas House Pub.

Chicago-referens (17:e uppl.)

Purcell, Henry, och Kevin Keil. A Trio of Catches: 3- Part, SAB and Piano. [S.l.]: Thomas House Pub, 1991.

MLA-referens (9:e uppl.)

Purcell, Henry, och Kevin Keil. A Trio of Catches: 3- Part, SAB and Piano. Thomas House Pub, 1991.