Hornby, Albert Sydney, author
Oxford University Press, 1954
Buku Referensi
Hornby, Albert Sydney, author
Oxford University Press, 1991
Buku Referensi
Folomkina, S., author
Moscow State Publishing House
Buku Referensi
Hornby, Albert Sydney, author
Oxford University Press, 1977
Buku Referensi
Crawley, Angela, author
Oxford University Press, 2000
Buku Referensi