Maxwell, John C., author
Menuju Insan Cemerlang, 2015
Buku Teks
Goa, Hillon I.
Grasindo, 2007
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Sinambela, Lijan Poltak, author
Bumi Aksara, 2016
Buku Teks
Ketut Sendra, author
PPM, 2007
Buku Teks
Davis, John
Gramedia Pustaka Utama, 1997
Buku Teks