Greenlees, Ian
Norman Douglas / Ian Greenlees
Longman Group, 1971
 Buku Teks SO
Merton, Stephen
Mark Rutherford ( William Hale White)
Twayne Publishing, 1967
 Buku Teks SO
Semmler, Clement
Douglas stewart : a critical study
Twayne, 1974
 Buku Teks SO
Pacific Islands yearbook/edited by Norman and Ngaire Douglas
[Canberra] Angus & Robertson 1989,
 Buku Referensi
Manchester, William
Mac Arthur: sang penakluk = American caesar, Douglas Mac Arthur, 1880-1964
Pustaka Sinar Harapan , 1994
 Buku Teks SO