by Luella B. Cook ... [and others]
Harcourt, Brace & World, 1957
Buku Teks
Holt, Rinehart and Winston, 1960
Buku Teks
Dean Curry, genaral series editor
English Language Programs Division, 1988
Buku Referensi
Montgomery, Robert L., author
Little, Brown, 1962
Buku Teks
Duke University Press,
Majalah, Jurnal, Buletin