APA
Percy John R Ed, European meeting of the Ameriacn association of variable star observers (1990 : Brussels), Mattei Janet Akyuz Ed & Sterken Christiaan Ed. (1992). Proceeding on Variable star observers: An international perspective. Cambridge: CUP.
Chicago
Percy John R Ed, European meeting of the Ameriacn association of variable star observers (1990 : Brussels), Mattei Janet Akyuz Ed and Sterken Christiaan Ed. 1992. Proceeding on Variable star observers: An international perspective. Cambridge: CUP.
Harvard
Percy John R Ed, European meeting of the Ameriacn association of variable star observers (1990 : Brussels), Mattei Janet Akyuz Ed and Sterken Christiaan Ed. (1992). Proceeding on Variable star observers: An international perspective. Cambridge: CUP.
MLA
Percy John R Ed, European meeting of the Ameriacn association of variable star observers (1990 : Brussels), Mattei Janet Akyuz Ed and Sterken Christiaan Ed. Proceeding on Variable star observers: An international perspective. Cambridge: CUP. 1992.
