Singh, Y. (1990). Encyclopaedic dictionary of commerce Vol V. Akashdeep.
Lua i Stíl Chicago (17ú heag.)Singh, Y. Encyclopaedic Dictionary of Commerce Vol V. Delhi: Akashdeep, 1990.
Lua MLA (9ú heag.)Singh, Y. Encyclopaedic Dictionary of Commerce Vol V. Akashdeep, 1990.
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