Παραπομπή APA

Basu, R. N. e. a. (1979). Eradication of smallpox from India.

Παραπομπή Chicago Style

Basu, R N et al. Eradication of Smallpox from India. 1979.

Παραπομπή MLA

Basu, R N et al. Eradication of Smallpox from India. 1979.