APA (7th ed.) Citation

Rigge, W. F. (1908). The Pope and the Comet. s.n.

Chicago Style (17th ed.) Citation

Rigge, William F. The Pope and the Comet. [S.l.: s.n, 1908.

MLA (9th ed.) Citation

Rigge, William F. The Pope and the Comet. s.n, 1908.

Warning: These citations may not always be 100% accurate.