Halpin, A. W. (1966). Theory and research in administration. Macmillan.
Lua i Stíl Chicago (17ú heag.)Halpin, Andrew Williams. Theory and Research in Administration. New York: Macmillan, 1966.
Lua MLA (9ú heag.)Halpin, Andrew Williams. Theory and Research in Administration. Macmillan, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.