Nathanael Iskandar, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1970
UI - Disertasi (Membership)
Petersen, William, author
Macmillan, 1961
Buku Teks
Petersen, William, author
Macmillan, 1969
Buku Teks
Petersen, William, author
Macmillan, 1969
Buku Teks
National Academy of Sciences-National Research Council , 1963
Buku Teks