Valdellon, T. C., & Javier, E. V. (1981). The marketing operations of black pepper traders in Batangas. Information Section, Bureau of Agricultural Economics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रValdellon, Taciana C., और Editha V. Javier. The Marketing Operations of Black Pepper Traders in Batangas. Quezon City: Information Section, Bureau of Agricultural Economics, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रValdellon, Taciana C., और Editha V. Javier. The Marketing Operations of Black Pepper Traders in Batangas. Information Section, Bureau of Agricultural Economics, 1981.
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