ebrary, Inc, Aulich, C., & Wettenhall, R. L. (2008). Howard's fourth government. UNSW Press.
Chicago Style (17th ed.) Zitazioaebrary, Inc, Chris Aulich, eta R. L. Wettenhall. Howard's Fourth Government. Sydney, N.S.W.: UNSW Press, 2008.
MLA (9th ed.) Zitazioaebrary, Inc, et al. Howard's Fourth Government. UNSW Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.