Abramson, J. H., & Abramson, Z. H. (1999). Survey methods in community medicine: Epidemiological research, programme evaluation, clinical trials (5th ed.). Churchill Livingstone.
Παραπομπή σε μορφή Chicago (17η εκδ.)Abramson, J. H., και Z. H. Abramson. Survey Methods in Community Medicine: Epidemiological Research, Programme Evaluation, Clinical Trials. 5th ed. Edinburgh ; New York: Churchill Livingstone, 1999.
Παραπομπή σε μορφή MLA (8th εκδ.)Abramson, J. H., και Z. H. Abramson. Survey Methods in Community Medicine: Epidemiological Research, Programme Evaluation, Clinical Trials. 5th ed. Churchill Livingstone, 1999.
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