De Leon, H. S. (1977). Handbook on insurance and sales, with Insolvency law (1977 ed.). National Book Store.
Lua i Stíl Chicago (17ú heag.)De Leon, Hector S. Handbook on Insurance and Sales, with Insolvency Law. 1977 ed. Manila: National Book Store, 1977.
Lua MLA (9ú heag.)De Leon, Hector S. Handbook on Insurance and Sales, with Insolvency Law. 1977 ed. National Book Store, 1977.
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