Brown, L. R., Flavin, C., & Kane, H. (1997). Vital signs 1996: The trends that are shaping our future. W. W. Norton.
Chicago (17e ed.) BronvermeldingBrown, Lester Russell, Christopher Flavin, en Hal Kane. Vital Signs 1996: The Trends That Are Shaping Our Future. New York: W. W. Norton, 1997.
MLA (9e ed.) BronvermeldingBrown, Lester Russell, et al. Vital Signs 1996: The Trends That Are Shaping Our Future. W. W. Norton, 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.