APA Format
World Health Organization (WHO) . (). Effective choices for diagnostic imaging in clinical practice, TRS.795. : Geneva WHO 1990
MLA Format
World Health Organization (WHO) . Effective choices for diagnostic imaging in clinical practice, TRS.795. : Geneva WHO 1990,
Australian/Harvard Format
World Health Organization (WHO) . . Effective choices for diagnostic imaging in clinical practice, TRS.795. Geneva WHO 1990, 
Warning: These citations may not always be 100% accurate.