Singh, G. S. (1985). The negative exponential model: A synthesis of rank, gravity, and entropy functions in urban geography. Govind Ballabh Pant Social Science Institute.
Citação do estilo Chicago (17ª ed.)Singh, Govind Saran. The Negative Exponential Model: A Synthesis of Rank, Gravity, and Entropy Functions in Urban Geography. Allahabad: Govind Ballabh Pant Social Science Institute, 1985.
Citação MLA (8ª ed.)Singh, Govind Saran. The Negative Exponential Model: A Synthesis of Rank, Gravity, and Entropy Functions in Urban Geography. Govind Ballabh Pant Social Science Institute, 1985.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.