Longford, Elizabeth
Weidenfeld and Nicolson, 1969
Buku Teks
Williangton, C. Oliver
D. Van Nostrand Co., 1956
Buku Teks
Wellington, C. Oliver
van Nostrand, Comp., Inc , 1960
Buku Teks
Samadi
Pustaka Jaya, 1975
Buku Teks
Hutagalung, Mangasa Sotarduga
Tulodong, 2007
Buku Teks