APA (7th ed.) Citation

Dalby, C. E. (1950). Trumpet problems: Two books leading to mastery of tone production, tongue control, register and other trumpet problems. Belwin.

Chicago Style (17th ed.) Citation

Dalby, Cleon E. Trumpet Problems: Two Books Leading to Mastery of Tone Production, Tongue Control, Register and Other Trumpet Problems. New York: Belwin, 1950.

MLA (9th ed.) Citation

Dalby, Cleon E. Trumpet Problems: Two Books Leading to Mastery of Tone Production, Tongue Control, Register and Other Trumpet Problems. Belwin, 1950.