O'Toole, J., Sinclair, M., & Leder, K. (2008). Maximising response rates in household telephone surveys. BioMed Central.
Chicago Style aipamenaO'Toole, Joanne, Martha Sinclair, and Karin Leder. Maximising Response Rates in Household Telephone Surveys. BioMed Central, 2008.
MLA aipamenaO'Toole, Joanne, Martha Sinclair, and Karin Leder. Maximising Response Rates in Household Telephone Surveys. BioMed Central, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.