Hooper, W. (1968). Arrangements: For Men's Voices Nº 4 Spirituals and Folk-Hymns. Key Music Company.
Chicago-viite (17. p.)Hooper, Wayne. Arrangements: For Men's Voices Nº 4 Spirituals and Folk-Hymns. Glendale, California: Key Music Company, 1968.
MLA-viite (9. p.)Hooper, Wayne. Arrangements: For Men's Voices Nº 4 Spirituals and Folk-Hymns. Key Music Company, 1968.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.