APA (7th ed.) Citation

Ewen, D. (1968). Twentieth century composers. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Ewen, David. Twentieth Century Composers. Freeport, N.Y.: Books for Libraries Press, 1968.

MLA (9th ed.) Citation

Ewen, David. Twentieth Century Composers. Books for Libraries Press, 1968.