Orig, T. S. (1997). UPLB professor honored by IOWA State University alumni. Manila Bulletin.
Chicagoスタイル(17版)引用形式Orig, Thor S. "UPLB Professor Honored by IOWA State University Alumni." Manila Bulletin 1997.
MLA(9版)引用形式Orig, Thor S. "UPLB Professor Honored by IOWA State University Alumni." Manila Bulletin, 1997.
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