MIning investment policies in Indonesia
 Artikel Jurnal
Conceptual foundations of behavioral assessment / Rosemerry O. Nelson; Steven C. Hayes
Guilford Press, 1986
 Buku Teks SO
Conceptual foundations of behavioral assessment / Rosemerry O. Nelson; Steven C. Hayes
Guilford Press, 1986
 Buku Teks SO
Aboyade, Ojetunji
Foundations of an African economy : a study of investment and growth in Nigeria
Praeger, 1966
 Buku Teks
Keedy, Mervin L.
Geometry: a modern introduction / Mervin L. Keedy, Charles W. Nelson
Addison-Wesley Pub. Co. , 1965
 Buku Teks