Conference of Directors of Special Courses, 1987
Buku Teks
Altick, Richard D. (Richard Daniel)
Macmillan, 1951
Buku Teks
Ghafour Amouzad Mahdiraji, Edwin C. Y. Chung, Satesh Narayana Namasivayam, Mohammad Hosseini Fouladi, editors
Springer Nature, 2019
eBooks
Melander, Sheila, author
Saunders, 2004
Buku Teks
Oceana Publications, Inc., 1964
Buku Teks