Comeau, Raymond F.
Holt, Rinehart, and Winston, 1986
Buku Teks
Jian, Gerard
Houghton Mifflin, 1990
Buku Teks
Dempwolff, Otto, author
C. Boysen, 1934
Buku Klasik
Moirand, Sophie
Cle International, 1979
Buku Teks
Wangler, Hans-Heinrich
Elwert, 1974
Buku Teks