KUMAR, P. MATHS OLYMPIAD INTERNATIONAL MATHEMATICS OLYMPIAD- 7. V & S PUBLISHER.
芝加哥风格引文KUMAR, PRASOON. MATHS OLYMPIAD INTERNATIONAL MATHEMATICS OLYMPIAD- 7. NEW DELHI: V & S PUBLISHER.
MLA引文KUMAR, PRASOON. MATHS OLYMPIAD INTERNATIONAL MATHEMATICS OLYMPIAD- 7. V & S PUBLISHER.
警告：这些引文格式不一定是100％准确.