APA (7th ed.) Citation

Aurobindo. (1951). The riddle of this world. Aurobindo Ashram.

Chicago Style (17th ed.) Citation

Aurobindo. The Riddle of This World. Pondicherry: Aurobindo Ashram, 1951.

MLA (9th ed.) Citation

Aurobindo. The Riddle of This World. Aurobindo Ashram, 1951.

Warning: These citations may not always be 100% accurate.