edited by David W. Orr
University of North Carolina Press, 1979
Buku Teks
edited by Greg Crouch, Ted Wheelwright, Ted Wilshire
Penguin Books, 1980
Buku Teks
Messel, H., author
Pergamon Press, 1979
Buku Teks
Lewis, William Arthur, 1915-, author
Princeton University Press, 1978
Buku Teks
edited by Howard Newby
John Wiley & Sons, 1978
Buku Teks