by Lee Soo Am ... [et al.] ; general editor, Yip Yat-hoong
University of Singapore , 1973
Buku Teks SO
edited by Yat-hoong Yip
Regional Institute of Higher Education and Development, 1972
Buku Teks
Kantner, John F.
Lixington Books, 1975
Buku Teks
edited by Nancy Chng
Select Books, 1977
Buku Teks
edited by John F. Kantner, Lee McCaffrey
Lexington Books, 1975
Buku Referensi