APA
Hardi P., Weidenfeld W., . (1994). Environmental Protection in East - Central Europe. A Market-Oriented Approach. Güthersloh: Bertelsmann Stiftung.
Chicago
Hardi Peter, Weidenfeld Werner, . 1994. Environmental Protection in East - Central Europe. A Market-Oriented Approach. Güthersloh: Bertelsmann Stiftung.
Harvard
Hardi P., Weidenfeld W., . (1994). Environmental Protection in East - Central Europe. A Market-Oriented Approach. Güthersloh: Bertelsmann Stiftung.
MLA
Hardi Peter, Weidenfeld Werner, . Environmental Protection in East - Central Europe. A Market-Oriented Approach. Güthersloh: Bertelsmann Stiftung. 1994.