Robinson, Roland E.
Macmillan, 1978
Buku Teks
Robinson, Roland
Anus and Robertson, 1971
Buku Teks
Robinson, Rolland
Macmillan, 1973
Buku Teks
Robinson, Roland I., author
McGraw-Hill , 1962
Buku Teks
Nehru, Jawaharlal, 1889-1964, author
Oxford University Press, 1982,
Buku Referensi