Carnegie, Dale
Apollo, [date of publication not identified]
Buku Teks
L. Murbandono
Grasindo, 2004
Buku Teks
Gunseikanbu, author
Gadjah Mada University Press, 1986
Buku Referensi
Naisaban, Ladislaus
Grasindo, 2004
Buku Teks
Neville, Isdell, author
Erlangga , 2011
Buku Teks