by Eldra Pearl Solomon [and others]
Saunders College , 1993
Buku Teks
by James D. Ebert ... [and others]
Holt, Rinehart and Winston, 1973
Buku Teks
by Robert J. Brooker ... [and others]
McGraw-Hill, 2008
Buku Teks
Murray, P. D. F. (Patrick Desmond Fitzgerald)
Macmillan, 1961
Buku Teks
Hole, C.B., author
ELBS and Macmillan Education, 1997
Buku Teks