Lua APA (7ú heag.)
Webb, E. (1966). Unobtrusive measures: Nonreactive research in the social sciences. Rand McNally College publ Co..
Lua i Stíl Chicago (17ú heag.)
Webb, Eugene. Unobtrusive Measures: Nonreactive Research in the Social Sciences. Chicago: Rand McNally College publ Co., 1966.
Lua MLA (9ú heag.)
Webb, Eugene. Unobtrusive Measures: Nonreactive Research in the Social Sciences. Rand McNally College publ Co., 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.