Hasibuan, Sofia
Gramedia, 1986
Buku Teks
McArthur, Thomas Burns
Oxford University Press, 1983
Buku Teks
Lixin, Yinghan
[publisher not identified], 2001
Buku Referensi
Gloria R. Poedjosoedarmo, 1943-
Gramedia Pustaka Utama , 1992
Buku Teks
Lipsey, Richard G.
Harper Collin, 1996
Buku Teks