Dent, Borden D.
McGraw-Hill , 1999
Buku Teks SO
Keates, J. S.
John Wiley & Sons, 1973
Buku Teks SO
edited by Barbara P. Buttenfield, Robert B. McMaster ; foreword by Herbert Freeman
Longman Scientific & Technical, 1991
Buku Teks SO
Raisz, Erwin Josephus, 1893-
McGraw-Hill, 1948
Buku Teks SO
Robinson, Arthur H.
John Wiley & Sons, 1978
Buku Teks SO