APA (7th ed.) Citation

Shaw, B. (1990). The perfect Wagnerite: A commentary on the Niblung's ring. Project Gutenberg.

Chicago Style (17th ed.) Citation

Shaw, Bernard. The Perfect Wagnerite: A Commentary on the Niblung's Ring. Champaign, Ill.: Project Gutenberg, 1990.

MLA (9th ed.) Citation

Shaw, Bernard. The Perfect Wagnerite: A Commentary on the Niblung's Ring. Project Gutenberg, 1990.