Παραπομπή APA

Vishwanatha Ayyer N E. (1988). Prashasanik patravyavahar. Swathi Prakashan.

Παραπομπή Chicago Style

Vishwanatha Ayyer N E. Prashasanik Patravyavahar. Thiruvananthapuram: Swathi Prakashan, 1988.

Παραπομπή MLA

Vishwanatha Ayyer N E. Prashasanik Patravyavahar. Swathi Prakashan, 1988.