MLA

Marx, Adolf Bernhard. Musical Form In the Age of Beethoven: Selected Writings On Theory and Method. Cambridge University Press, 1998.

APA

Marx, A. Bernhard. (1998). Musical form in the age of Beethoven: Selected writings on theory and method. Cambridge University Press.

Chicago

Marx, Adolf Bernhard, and Scott Burnham. Musical Form In the Age of Beethoven: Selected Writings On Theory and Method. : Cambridge University Press, 1998.