APA (7th ed.) Citation

Thompson, J. S. (1955). Easiest piano course: Part one. Willis Music.

Chicago Style (17th ed.) Citation

Thompson, John Sylvanus. Easiest Piano Course: Part One. Cincinnati, Ohio: Willis Music, 1955.

MLA (9th ed.) Citation

Thompson, John Sylvanus. Easiest Piano Course: Part One. Willis Music, 1955.