Cita APA (7th ed.)
George, S., Gundolf, F., Boehringer, R., & Landmann, G. P. (1962). Briefwechsel: Stefan George, Friedrich Gundolf [d.i. Friedrich Gundelfinger]. Küpper.
Cita Chicago (17th ed.)
George, Stefan, Friedrich Gundolf, Robert Boehringer, i Georg Peter Landmann. Briefwechsel: Stefan George, Friedrich Gundolf [d.i. Friedrich Gundelfinger]. München, Düsseldorf: Küpper, 1962.
Cita MLA (9th ed.)
George, Stefan, et al. Briefwechsel: Stefan George, Friedrich Gundolf [d.i. Friedrich Gundelfinger]. Küpper, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.