Ali Said
Ethika , 1967
Buku Teks
Nasution, B.
Maesada, 1951
Buku Teks
Nugroho Notosusanto
[publisher not identified], [date of publication not identified]
Buku Teks
Sitorus, L. M.
Pustaka Rakjat, 1951
Buku Teks
Nasution, Abdul Haris, 1918-2000
Mega Boostore, 1966
Buku Teks