Henderson, I. F., author
Harlow, England Longman Scientific and Technical
Buku Referensi
Page, G. Terry
New York Kogan Page 1977
Buku Referensi
Page, G. Terry, author
New York, Kogan Page, 1977
Buku Referensi
Thomas, Joseph, author
Philadelphia : J.B. Lippincott, 1915
Buku Referensi
Sykes, Egerton, author
London, J.M. Dent and Sons
Buku Referensi