Lee, Rose Hume, author
J.B. Lippincott, 1955
Buku Teks
edited by William A. Robson
Macmillan, 1955
Buku Teks
Orum, Anthony M., author
Blackwell, 2003
Buku Teks
Palen, J. John, author
McGraw-Hill, 1992
Buku Teks
Palen, J. John, author
McGraw-Hill, 1981
Buku Teks