Gaya APA

Abramson, J. (1990). Survey Methods in Community Medicine : Epidemiological Studies, Programme Evaluation, Clinical Trial.-- 4th ed. . Edinburgh: Longman Group UK.

Gaya MLA

Abramson, J.H.. "Survey Methods in Community Medicine : Epidemiological Studies, Programme Evaluation, Clinical Trial.-- 4th ed.". Edinburgh: Longman Group UK, 1990. print.