APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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