Worldwatch Institute. (2006). Vital signs 2006-2007: The trends that are shaping our future. Norton.
Chicagoスタイル(17版)引用形式Worldwatch Institute. Vital Signs 2006-2007: The Trends That Are Shaping Our Future. New York: Norton, 2006.
MLA(9版)引用形式Worldwatch Institute. Vital Signs 2006-2007: The Trends That Are Shaping Our Future. Norton, 2006.
警告: この引用は必ずしも正確ではありません.