Henderson, I. F.
Longman, 1975
Buku Referensi
Lawrence, Eleanor
Prentice-Hall, 2000
Buku Referensi
Lawrence, Eleanor
John Wiley & Sons, 1989
Buku Teks
edited by Philip Winn
Routledge, 2001
Buku Referensi
Henderson, I. F., author
Harlow, England Longman Scientific and Technical
Buku Referensi