Henson, M. A. (1958). Gamblers' lazy and dutiful numbers in the Philippine Charity Sweepstakes (000 000 through 099 999). s.n.
Chicagoスタイル(17版)引用形式Henson, Mariano A. Gamblers' Lazy and Dutiful Numbers in the Philippine Charity Sweepstakes (000 000 Through 099 999). [Angeles City, Pampanga: s.n, 1958.
MLA(9版)引用形式Henson, Mariano A. Gamblers' Lazy and Dutiful Numbers in the Philippine Charity Sweepstakes (000 000 Through 099 999). s.n, 1958.
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