Runyon, Richard P., author
Addison-Wesley, 1968
Buku Teks
Runyon, Richard P., author
Addison-Wesley, 1967
Buku Teks
Siegel, Sidney, author
McGraw-Hill , 1988
Buku Teks
Howell, David C., author
Thomson Higher Education, 2004
Buku Teks
Jaccard, James, author
Wadsworth, 1983
Buku Teks