APA (7e ed.) Bronvermelding

Williams, C. T. (1979). Elements of research: A guide for writers. Alfred.

Chicago (17e ed.) Bronvermelding

Williams, Carol T. Elements of Research: A Guide for Writers. Sherman Oaks: Alfred, 1979.

MLA (9e ed.) Bronvermelding

Williams, Carol T. Elements of Research: A Guide for Writers. Alfred, 1979.