Mardalis
Bumi Aksara, 1990
Buku Teks
Wawolumaja, Corrie, author
Setia Bumi Jaya, 1998
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Bhisma Murti, author
Gajah Mada University Press, 2003
Buku Teks
Siregar, Syofian, author
Kencana Prenada Media Group, 2017
Buku Teks
Walizer, Michael H., author
Erlangga, 1986
Buku Teks