Cita APA (7a ed.)

Ruben, S. (1965). The elements (1a ed.). [s.n.].

Cita Chicago Style (17a ed.)

Ruben, Samuel. The Elements. 1a ed. Slough: [s.n.], 1965.

Cita MLA (9a ed.)

Ruben, Samuel. The Elements. 1a ed. [s.n.], 1965.