Sundharan, K. (1975). Principles of economics (11th.). Vikas.
Lua i Stíl Chicago (17ú heag.)Sundharan, K. Principles of Economics. 11th. Delhi: Vikas, 1975.
Lua MLA (9ú heag.)Sundharan, K. Principles of Economics. 11th. Vikas, 1975.
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