Παραπομπή APA

Abdul Kalam, A. P. J. (2005). life tree. Penguin Books India.

Παραπομπή Chicago Style

Abdul Kalam, A. P. J. Life Tree. New Delhi: Penguin Books India, 2005.

Παραπομπή MLA

Abdul Kalam, A. P. J. Life Tree. Penguin Books India, 2005.