Simmons, Colin H., author
Edward Arnold, 1995
Buku Referensi
Simmons, Colin H., author
Elsevier, 2009
Buku Referensi
edited by Douglas C. Greenwood
McGraw-Hill, 1959
Buku Referensi
Metcalf, Richard W., author
Harcourt Brace Jovanovich, 1990
Buku Teks
Markus, John, 1911-, author
McGraw-Hill, 1980
Buku Referensi