Dailey, Charles Alvin, 1923-, author
Parker, 1970
Buku Teks
Odiorne, George S., author
WED International, [Date of publication not identified]
Buku Teks
ASEAN Secretariat, 2016
Buku Teks
Baker, H. Kent, author
Emerald, 2017
eBooks
Mathews, M. M.
Henry Holt, 1956
Buku Teks