APA (7th ed.) Citation
NELSON, D., & ET AL. (1998). THE VALIDITY OF SELF-REPORTED OPIATE AND COCAINE USE BY OUT-OF-TREATMENT DRUG USERS.
Chicago Style (17th ed.) Citation
NELSON, D.B, and ET AL. THE VALIDITY OF SELF-REPORTED OPIATE AND COCAINE USE BY OUT-OF-TREATMENT DRUG USERS. 1998.
MLA (9th ed.) Citation
NELSON, D.B, and ET AL. THE VALIDITY OF SELF-REPORTED OPIATE AND COCAINE USE BY OUT-OF-TREATMENT DRUG USERS. 1998.
Warning: These citations may not always be 100% accurate.