edited by Somers Gill
Frederick Warne, [1948]
Buku Referensi
Simon, W., author
Lund Humphries & Co, 1947
Buku Referensi
Ciardi, John, author
Harper & Row , 1980
Buku Referensi
Stimson, J. Frank, author
Martinus Nijhoff, 1964
Buku Referensi
Mawson, C. O. Sylvester, author
Garden City Publishing Company, 1940
Buku Referensi