Cita APA (7a ed.)

Ohri, V. K., Singh, Y. P., & Verma, A. K. (2006). Textbook for class IX: Political science, economics and disaster management. V. K. Enterprises.

Cita Chicago Style (17a ed.)

Ohri, V. K., Yash Pal Singh, y Avnindra Kumar Verma. Textbook for Class IX: Political Science, Economics and Disaster Management. New Delhi: V. K. Enterprises, 2006.

Cita MLA (9a ed.)

Ohri, V. K., et al. Textbook for Class IX: Political Science, Economics and Disaster Management. V. K. Enterprises, 2006.