Wiles, P. (1972). The security industry in the United Kingdom: Papers pres. to the Cropwood Round-table Conference July 1971. Cropwood conference series.
Chicago-Zitierstil (17. Ausg.)Wiles, Paul. "The Security Industry in the United Kingdom: Papers Pres. to the Cropwood Round-table Conference July 1971." Cropwood Conference Series 1972.
MLA-Zitierstil (8. Ausg.)Wiles, Paul. "The Security Industry in the United Kingdom: Papers Pres. to the Cropwood Round-table Conference July 1971." Cropwood Conference Series, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.