Sengupta, P. K. (1968). Demonstration and Logical Truth. Academic Publishers.
Citazione stile Chigago Style (17a edizione)Sengupta, Pradip Kumar. Demonstration and Logical Truth. Calcutta: Academic Publishers, 1968.
Citatione MLA (9a ed.)Sengupta, Pradip Kumar. Demonstration and Logical Truth. Academic Publishers, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.