Cita APA (7a ed.)

Purdom, C. B. (1963). The letchworth achievement. J. M. Dont.

Cita Chicago Style (17a ed.)

Purdom, Charles Benjamin. The Letchworth Achievement. Londres: J. M. Dont, 1963.

Cita MLA (9a ed.)

Purdom, Charles Benjamin. The Letchworth Achievement. J. M. Dont, 1963.