Cita APA (7a ed.)

Downey, A. B. (2008). The little book of semaphores (v. 2.1.5 ed.). [S.n.].

Cita Chicago Style (17a ed.)

Downey, Allen B. The Little Book of Semaphores. v. 2.1.5 ed. [S.l.]: [S.n.], 2008.

Cita MLA (9a ed.)

Downey, Allen B. The Little Book of Semaphores. v. 2.1.5 ed. [S.n.], 2008.