1. Principles of Corporate Finance;Brealey,1984
2. Indonesia's Oil;Carlson,1977
3. Risk analysis in capital investment;Hertz;Harvard Business Review,1964
4. An analysis of oil and trade in Japan-Indonesia relations;Hsiao;The Journal of Energy and Development,1982
5. Micros in mathematics education - uses of spreadsheets in CAL;Hsiao;International Journal of Mathematical Education in Science and Technology,1985