Appleby, Paul H., author
University of Alabama, 1949
Buku Teks
Charlesworth, James C. (James Clyde), 1900-, author
Harper, 1951
Buku Teks
Rosenbloom, David H., author
McGraw-Hill International, 2005
Buku Teks
Rosenbloom, David H., author
McGraw-Hill Education, 2015
Buku Teks
edited by Roscoe C. Martin
Syracuse University Press , 1965
Buku Teks