APA (7th ed.) Citation

Kirk, E. O. (1891). Ciphers. Houghton, Mifflin.

Chicago Style (17th ed.) Citation

Kirk, Ellen Olney. Ciphers. Boston: Houghton, Mifflin, 1891.

MLA (9th ed.) Citation

Kirk, Ellen Olney. Ciphers. Houghton, Mifflin, 1891.

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