Citazione Stile APA (7a Edizione)

Gray, G., & Guppy, N. (2003). Successful Surveys: Research Methods and Practice (3rd ed.). Thomson Nelson.

Citazione stile Chigago Style (17a edizione)

Gray, George, e Neil Guppy. Successful Surveys: Research Methods and Practice. 3rd ed. Scarborough: Thomson Nelson, 2003.

Citatione MLA (9a ed.)

Gray, George, e Neil Guppy. Successful Surveys: Research Methods and Practice. 3rd ed. Thomson Nelson, 2003.