Levin, Lennart, author
Almqvist och Wiksell, 1972
Buku Teks
National Textbook, 1975
Buku Teks
Langacker, Ronald W., author
Harcourt, Brace & World, 1968
Buku Teks
Vachek, Josef, author
Indiana University Press, 1966
Buku Teks
Katz, Jerrold J., author
George Allen and Unwin, 1972
Buku Teks