Partlow, Robert B.
Prentice-Hall, 1963
Buku Teks
Dean Curry, genaral series editor
English Language Programs Division, 1988
Buku Referensi
Watt, William W. (William Whyte)
Holt, Rinehart and Winston, 1961
Koleksi Publik
Watt, William W. (William Whyte)
Holt, Rinehart and Winston, 1961
Koleksi Publik
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks