Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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