APA (7th ed.) Citation

Perry, P., & Cole, E. O. (1900). Priggish penguin. P. Perry.

Chicago Style (17th ed.) Citation

Perry, Powell, and Ernest O. Cole. Priggish Penguin. [London?]: P. Perry, 1900.

MLA (9th ed.) Citation

Perry, Powell, and Ernest O. Cole. Priggish Penguin. P. Perry, 1900.