Dahl, Curtis
Twayne , 1963
Buku Teks
edited by James M. Cox
Prentice-Hall, 1962
Buku Teks
Ni Made Rai Suma Intari, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2011
UI - Tesis (Open)
Sparrow, John, 1906-
Published for the British Council and the National Book League by Longmans, Green & Co, 1992
Buku Teks
Day, A. Grove (Arthur Grove), 1904-1994, author
Twayne, 1974
Buku Teks