Cita APA (7th ed.)

McNab, R. (1913). Open letters on proportional representation. s.n.].

Cita Chicago (17th ed.)

McNab, Robert. Open Letters on Proportional Representation. [Wellington?: s.n.], 1913.

Cita MLA (9th ed.)

McNab, Robert. Open Letters on Proportional Representation. s.n.], 1913.