Bailey, Joe
Routledge & Kegan Paul, 1980
Buku Teks
Ross, H. Laurence (Hugh Laurence), author
McGraw-Hill, 1973
Buku Teks
Rotterdam University Press, 1974
Buku Teks
Parsons, Talcott, author
The Free Press , 1964
Buku Teks
Loomis, Charles P., author
D Van Nostrand , 1965
Buku Teks