Citazione Stile APA (7a Edizione)

Winkler, F. E., & Gilliam, M. G. H. (1974). For freedom destined: Mysteries of man's evolution in the mythology of Wagner's Ring operas and Parsifal. Waldorf Press.

Citazione stile Chigago Style (17a edizione)

Winkler, Franz E., e M. G. H. Gilliam. For Freedom Destined: Mysteries of Man's Evolution in the Mythology of Wagner's Ring Operas and Parsifal. Garden City, N.Y.: Waldorf Press, 1974.

Citatione MLA (8a ed.)

Winkler, Franz E., e M. G. H. Gilliam. For Freedom Destined: Mysteries of Man's Evolution in the Mythology of Wagner's Ring Operas and Parsifal. Waldorf Press, 1974.