Elegant, Robert S.
Twayne Publishers, 1951
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Seprida Wulandari, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2018
UI - Skripsi (Membership)
Malchow, Howard L., author
Bloomsbury Academic, an imprint of Bloomsbury Pub, 2016
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Larasati Meidiana, author
2015
UI - Makalah dan Kertas Kerja
World Anti-Communist League, 1987
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