The American political dictionray

 Plano, Jack C.; Greenberg, Milton;

Fort Worth, Texas : Harcourt College Publishers , 2002

Ocular emergencies

 Robert A. Catalano;

Philadelphia : W.B. Saunders Company , 1992

Agama dalam analisa dan interpretasi sosiologis

 Robertson, Roland; Saifuddin, Ahmad Fedyani;

Jakarta : Rajawali Pers , 1995

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