Cita APA (7th ed.)

Kalam, A. A. P. J. R. Y. S. (1998). India 2020. McGraw - Hill.

Cita Chicago (17th ed.)

Kalam, Abdul A P J; Rajan Y S. India 2020. New York: McGraw - Hill, 1998.

Cita MLA (9th ed.)

Kalam, Abdul A P J; Rajan Y S. India 2020. McGraw - Hill, 1998.