APA Format
World Health Organization (WHO) . (). Sampling methods in morbidity surveys and public health investigations, TRS.336. : Geneva WHO 1966
MLA Format
World Health Organization (WHO) . Sampling methods in morbidity surveys and public health investigations, TRS.336. : Geneva WHO 1966,
Australian/Harvard Format
World Health Organization (WHO) . . Sampling methods in morbidity surveys and public health investigations, TRS.336. Geneva WHO 1966, 
Warning: These citations may not always be 100% accurate.