Kumar, Dharmendra
House PVI LTD., 1913
Buku Teks
DeGarmo, E. Paul
Macmillan Publishing Co., 1979
Buku Teks
DeGaremo, E. Paul
Collier-Macmillan Limited, 1969
Buku Teks
Bhowmik, Sumit
Springer Cham, 2019
eBooks
Jordan, James A.
John Wiley & Sons, 2000
Buku Teks