APA

Frey, H. (1924). A Collection of 25 selected famous Negro spirituals. New York: Robbins Music.

MLA

Frey, Hugo. A Collection of 25 Selected Famous Negro Spirituals. New York: Robbins Music, 1924. Musical score.

CHICAGO

Frey, Hugo. 1924. A Collection of 25 selected famous Negro spirituals. New York: Robbins Music.

HARVARD

FREY, H. (1924). A Collection of 25 selected famous Negro spirituals. New York, Robbins Music.

TURABIAN

Frey, Hugo. A Collection of 25 Selected Famous Negro Spirituals. New York: Robbins Music, 1924.