Thorp, Willard L., author
Organisation for Economic Co-operation and Development , 1964
Buku Teks
Todaro, Michael P., author
Bumi Aksara, 1995
Buku Teks
Todaro, Michael P., author
Ghalia Indonesia, 1983
Buku Teks
Todaro, Michael P., author
Gelora Aksara Pratama, 1993
Buku Teks
Baldwin, Robert E., author
Bina Aksara, 1981, 1983
Buku Teks