Wittman, Alfred
Elsevier, 1987
Buku Referensi
Anderson, R. G., author
Macdonald & Evans, 1982
Buku Referensi
Elsevier Scientific Publishing, 1971
Buku Referensi
Slee, Carry, author
FMB, 2011
Buku Teks
Dando, Sylvia, author
McGraw-Hill Book, 1987
Buku Referensi