Longman, 1990
Buku Teks
Sylvan Press, 1949
Buku Teks
Banks, J. A.
Routledge & Kegan Paul Limited, 1954
Buku Teks
edited by Patrick Brantlinger and William B. Thesing
Blackwell, 2002
Buku Referensi
Bryant, Arthur
The Albatross MCMXL.VII, 1947
Buku Teks