Travers, J. A. (1995). Introduction to private investigation: Essential knowledge and procedures for the private investigator. Thomas.
Chicago-Zitierstil (17. Ausg.)Travers, Joseph Anthony. Introduction to Private Investigation: Essential Knowledge and Procedures for the Private Investigator. Springfield, Ill: Thomas, 1995.
MLA-Zitierstil (8. Ausg.)Travers, Joseph Anthony. Introduction to Private Investigation: Essential Knowledge and Procedures for the Private Investigator. Thomas, 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.