Clyde, Paul Hibbert, author
Prentice-Hall, 1953
Buku Teks
Jolliffe, Jill
University of Queensland, 1978
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Routledge, 2015
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Aulia Maulida Safitri, author
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2023
UI - Tugas Akhir
Spencer, J.E., author
John Wiley & Sons, 1954
Buku Teks