Noreng, Wystein
McGraw-Hill , 1980
Buku Teks
Singh, Lalita Prasad, author
University of Missouri Press, 1966
Buku Teks
McLaughlin, Eugene, author
Avebury, 1994
Buku Teks
Mavroudi, Elizabeth, author
Routledge, 2016
Buku Teks
Chandra, Prakash, author
Vikas Publishing House, 1982
Buku Teks