Sastri, K.A. Nilakanta
Oxford University Press, 1958
Buku Teks SO
Schuman, Frederick L.
McGraw-Hill, 1958
Buku Teks SO
Lamb, Alastair
Oxford University Press, 1964
Buku Teks SO
Levi, Werner
University of Minnesota Press, 1954
Buku Teks
Malchow, Howard L.
Bloomsbury Academic, an imprint of Bloomsbury Pub, 2016
Buku Teks SO