Martin, E. A. (Elizabeth A.)
MacMillan Press, 1985
Buku Referensi
Macmillan, 1994
Buku Referensi
general editor, David W. Pearce
Macmillan Reference Books, 1989
Buku Referensi
general editor, David W. Pearce
Macmillan Press, 1992
Buku Referensi
R & R Newkirk/Longman, 1985
Buku Referensi