Peranginangin, K., author
Mutiara, 1978
Buku Teks
Graham, Walter W.
Littlefield, Adams & Co., 1965
Buku Teks
Mancill, Julian D.
Dodd, Mead & Company, 1968
Buku Teks
Rosenbaum, Robert A.
Addison-Wesley Pub. Co., 1963
Buku Teks
Peranginangin, K., author
Mutiara, 1978
Buku Teks