Ginsberg, Gerald L., author
John Wiley & Sons, 1981
Buku Teks
Ginsberg, Gerald L., author
John Wiley & Sons, 1981
Buku Teks
Charles A. Harper, editor-in-chief
McGraw-Hill, 1977
Buku Referensi
Jones, Thomas H., author
Reston Publishing Company, 1978
Buku Referensi
Genn, Robert C., author
Parker Publishing Company, 1981
Buku Referensi