Henson, M. A. (1958). Gamblers' lazy and dutiful numbers in the Philippine Charity Sweepstakes (000 000 through 099 999). s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHenson, Mariano A. Gamblers' Lazy and Dutiful Numbers in the Philippine Charity Sweepstakes (000 000 Through 099 999). [Angeles City, Pampanga: s.n, 1958.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHenson, Mariano A. Gamblers' Lazy and Dutiful Numbers in the Philippine Charity Sweepstakes (000 000 Through 099 999). s.n, 1958.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.