Castro, E. R. (1998). Outstanding scientists cited by Nat'l Academy. Manila Bulletin.
Chicago-viite (17. p.)Castro, Eddee RH. "Outstanding Scientists Cited by Nat'l Academy." Manila Bulletin 1998.
MLA-viite (9. p.)Castro, Eddee RH. "Outstanding Scientists Cited by Nat'l Academy." Manila Bulletin, 1998.
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