Cita APA (7th ed.)

Rickman, A. (1967). Signal and code: Ilustrated report. School of Graphics Chelsea.

Cita Chicago (17th ed.)

Rickman, Alan. Signal and Code: Ilustrated Report. Londres: School of Graphics Chelsea, 1967.

Cita MLA (9th ed.)

Rickman, Alan. Signal and Code: Ilustrated Report. School of Graphics Chelsea, 1967.