Henson, M. A. (1964). The date of issue and of circulation of Philippine postage stamps, 1854-1963. s.n.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHenson, Mariano A. The Date of Issue and of Circulation of Philippine Postage Stamps, 1854-1963. [Angeles City: s.n.], 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHenson, Mariano A. The Date of Issue and of Circulation of Philippine Postage Stamps, 1854-1963. s.n.], 1964.
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