Langford, C. M. (1988). The Population Investigation Committee: A concise history to mark its fiftieth anniversary. Population Investigation Committee at the London School of Economics.
Chicago-Zitierstil (17. Ausg.)Langford, C. M. The Population Investigation Committee: A Concise History to Mark Its Fiftieth Anniversary. London: Population Investigation Committee at the London School of Economics, 1988.
MLA-Zitierstil (9. Ausg.)Langford, C. M. The Population Investigation Committee: A Concise History to Mark Its Fiftieth Anniversary. Population Investigation Committee at the London School of Economics, 1988.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.