APA (7e ed.) Bronvermelding

Webb, E. T. (1981). Nonreactive measures in the social sciences (2nd ed.). Houghton Mifflin.

Chicago (17e ed.) Bronvermelding

Webb, Eugene T. Nonreactive Measures in the Social Sciences. 2nd ed. Boston: Houghton Mifflin, 1981.

MLA (9e ed.) Bronvermelding

Webb, Eugene T. Nonreactive Measures in the Social Sciences. 2nd ed. Houghton Mifflin, 1981.