Abdul Kalam, A. P. J., & Singh, S. P. (2011). Target 3 billion: PURA: innovative solutions towards sustainable development. Penguin Books, India.
Citazione stile Chigago Style (17a edizione)Abdul Kalam, A. P. J., e Srijan Pal Singh. Target 3 Billion: PURA: Innovative Solutions Towards Sustainable Development. New Delhi: Penguin Books, India, 2011.
Citatione MLA (8a ed.)Abdul Kalam, A. P. J., e Srijan Pal Singh. Target 3 Billion: PURA: Innovative Solutions Towards Sustainable Development. Penguin Books, India, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.