editor Sri Suwando...[et al.]
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Buku Teks
Pertamina, 1987
Buku Referensi
Pergamon Press.Inc, 1971
Buku Teks
Plutchik, Robert
Harper & Row , 1983
Buku Teks
Christensen, Larry B., 1941-, author
Pearson/Allyn & Bacon, 2007
Buku Teks