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Rajawali, 1983
Buku Teks
McGivney, Veronica
The National Institute of Adult Continuing Education, 1991
Buku Teks
Muhammad Attariq Zamel, author
2020
UI - Tugas Akhir
Parsons, Talcott, author
Prentice-Hall, 1977
Buku Teks
David L. Sam; John W. Berry, editor
Cambridge University Press, 2006
Buku Teks