APA (7th ed.) Citation

Allen-Brown, A., & Allen-Brown, D. (1913). The violet book. Lane [u.a.].

Chicago Style (17th ed.) Citation

Allen-Brown, A., and D. Allen-Brown. The Violet Book. London: Lane [u.a.], 1913.

MLA (9th ed.) Citation

Allen-Brown, A., and D. Allen-Brown. The Violet Book. Lane [u.a.], 1913.