Pitt, H. M. (1911). Reciprocity and the Philippine Islands. Manila Merchants' Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPitt, Harold M. Reciprocity and the Philippine Islands. Manila: Manila Merchants' Association, 1911.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPitt, Harold M. Reciprocity and the Philippine Islands. Manila Merchants' Association, 1911.
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