APA Format
World Health Organization (WHO) . (). Optimum physical performance capacity in adults/WHO. : Geneva WHO 1969
MLA Format
World Health Organization (WHO) . Optimum physical performance capacity in adults/WHO. : Geneva WHO 1969,
Australian/Harvard Format
World Health Organization (WHO) . . Optimum physical performance capacity in adults/WHO. Geneva WHO 1969, 
Warning: These citations may not always be 100% accurate.