Womack, James G., author
Benziger Bros, 1966
Buku Teks
Keesing, Roger M.
Holt, Rinehart and winston, 1975
Buku Teks
edited by Peter M. Blau
Open Books, 1976
Buku Teks
Collins, Orvis, author
Mouton, 1973
Buku Teks
Choi, Jae-sok, 1926-, author
Jimoondang , 2011
Buku Teks