Rock, William R.
Twayne Publishers, 1969
Buku Teks
Trethewey, Kenneth R. (Kenneth Richard), 1950-
Longman Scientific & Technical, 1988
Buku Teks
King, William Richard, 1938-, author
Van Nostrand Reinhold, 1978
Buku Teks
Iowa University 1971 ,
Buku Teks
King, William Richard, 1938-, author
McGraw-Hill, 1967
Buku Teks