edited by Edward Whiting Fox
Oxford University Press, 1957
Buku Teks
Pounds, Norman J. G., author
Frederick A. Praeger, 1964
Buku Teks
Selmann, R. R., author
Edward Arnold, 1953
Buku Referensi
Sellman, Roger Raymond, author
Edward Arnold, 1954
Buku Referensi
Hazard, Harry W., author
Princeton University Press, 1951
Buku Referensi