Yap-Diangco, R. T., & Yap-Diangco, N. L. Controversial political issues in Asia. Rex Book Store.
Lua i Stíl Chicago (17ú heag.)Yap-Diangco, Robert T., agus Norma L. Yap-Diangco. Controversial Political Issues in Asia. Manila: Rex Book Store.
Lua MLA (9ú heag.)Yap-Diangco, Robert T., agus Norma L. Yap-Diangco. Controversial Political Issues in Asia. Rex Book Store.
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