McNab, R. (1913). Open letters on proportional representation. s.n.].
Chicago Style aipamenaMcNab, Robert. Open Letters on Proportional Representation. [Wellington?: s.n.], 1913.
MLA aipamenaMcNab, Robert. Open Letters on Proportional Representation. s.n.], 1913.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.