APA-viite

Abdul Kalam A.P.J & Singh, S. P. Target 3 billion: PURA:innovative solutions towards sustainable development. Penguin books.

Chicago-tyylinen lähdeviittaus

Abdul Kalam A.P.J ja Srijan Pal Singh. Target 3 Billion: PURA:innovative Solutions Towards Sustainable Development. 2011: Penguin books.

MLA-viite

Abdul Kalam A.P.J ja Srijan Pal Singh. Target 3 Billion: PURA:innovative Solutions Towards Sustainable Development. Penguin books.