APA

Simpson B. J., Concawe & Simpson B. J. (1993). Existing substances regulation: CONCAWE guidance on completion of chapter 1 of HEDSET diskette. Brussels: Concawe.

Chicago

Simpson B J, Concawe and Simpson B J. 1993. Existing substances regulation: CONCAWE guidance on completion of chapter 1 of HEDSET diskette. Brussels: Concawe.

Harvard

Simpson B. J., Concawe and Simpson B. J. (1993). Existing substances regulation: CONCAWE guidance on completion of chapter 1 of HEDSET diskette. Brussels: Concawe.

MLA

Simpson B J, Concawe and Simpson B J. Existing substances regulation: CONCAWE guidance on completion of chapter 1 of HEDSET diskette. Brussels: Concawe. 1993.