Choudhary Pran & Others. (1992). Successful Sales Promotion. Orient Longman.
Lua i Stíl Chicago (17ú heag.)Choudhary Pran & Others. Successful Sales Promotion. Hyderabad: Orient Longman, 1992.
Lua MLA (9ú heag.)Choudhary Pran & Others. Successful Sales Promotion. Orient Longman, 1992.
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