Hough, L. (1970). Modern research for administrative decisions. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hough, Louis. Modern Research for Administrative Decisions. Englewood Cliffs, N.J: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Hough, Louis. Modern Research for Administrative Decisions. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.