APA (7th ed.) Citation

Elgar, E., & Young, P. M. (1956). Letters of Edward Elgar and other writings. G. Bles.

Chicago Style (17th ed.) Citation

Elgar, Edward, and Percy M. Young. Letters of Edward Elgar and Other Writings. London: G. Bles, 1956.

MLA (8th ed.) Citation

Elgar, Edward, and Percy M. Young. Letters of Edward Elgar and Other Writings. G. Bles, 1956.