Lindeman, Ralph D
Norman Douglas
Twayne Publishing, 1965
 Buku Teks
Greenlees, Ian
Norman Douglas / Ian Greenlees
Longman Group, 1971
 Buku Teks
Merton, Stephen
Mark Rutherford ( William Hale White)
Twayne Publishing, 1967
 Buku Teks
Pacific Islands yearbook/edited by Norman and Ngaire Douglas
[Canberra] Angus & Robertson 1989,
 Buku Referensi
Semmler, Clement, editor
Douglas stewart : a critical study / Clement Semmler
Twayne Publishers, 1974
 Buku Teks
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