Ensminger, Audrey; Ensminger, M.E.; Konlande, James E.; Robson, John R.K.
CRC Press, 1994
Buku Referensi
Sybil P. Parker, editor in chief
McGraw-Hill, 1994
Buku Referensi
Watkins, Alan
Duckworth, 1991
Buku Teks
Hutchinson, 1959
Buku Referensi
editor, Denis Leigh, C.M.B. Pare, John Marks
MTP Press, 1977
Buku Referensi