edited by James J. O'Brien, Robert G. Zilly
McGraw-Hill, 1971
Buku Referensi
Richard D. Irwin , 1964
Buku Teks
International Texbook , 1970
Buku Teks
Martindell, Jackson
Harper & Row Publishers, 1962
Buku Teks
Jackson, Keith
Routledge, Taylor & Francis Group, 2003
Buku Teks