Ramos, Fidel V.
Friends of Steady Eddie , 1992
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Tolentino, Arturo M.
Phoenix Pub. House, 1990
Buku Teks
Gleeck, Lewis E.
Historical Conservation Society, 1976
Buku Teks
editor John Bresnan; penerjemah Sonny Wyarso Amiluhur [and others]
Gramedia, 1988
Buku Teks
Roy, James A. Le
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Buku Teks