Reese, Music in the Renaissance. New York, W.W. Norton & Co., 1954. Manfred Bukofzer, Music in the Baroque Era. New York, W.W. Norton & Co., 1947. Ursula Kirkendale, "The Source for Bach's Musical Offering," Journal of the American Musicological Society 33 (1980), 99–141. The New Harvard Dictionary of Music, ed. Don Randel. Cambridge, Massachusetts, Harvard University Press, 1986. Arthur J. Ness, "Ricercar", Harvard Dictionary of Music, fourth edition, edited by Don Michael Randel, 729–31. Harvard University Press Reference Library. Cambridge: Belknap Press for Harvard University Press, 2003. . External links Petrucci Music Library Ricercar Collection Classical music styles