general editor, Yip Yat Hoong ; authors, Lee Soo Ann [and others]
Regional Institute of Higher Education and Development , 1973
Buku Teks
Kantner, John F.
Lixington Books, 1975
Buku Teks
edited by John F. Kantner, Lee McCaffrey
Lexington Books, 1975
Buku Referensi
edited by Nancy Chng
Select Books, 1977
Buku Teks
Tinbergen, Jan, 1903-
McGraw-Hill, 1967
Buku Teks