Robinson, Joan, author
C.A. Watts, 1962
Buku Teks
Negara, Siwage Dharma, author
ISEAS Publishing, 2018
eBooks
Kirzner, Israel M., author
D. Van Nostrand , 1960
Buku Teks
Lynn, Robert Athan, 1930-, author
McGraw-Hill, 1980
Buku Teks
Mehta, J.K., author
Caitanya Publishing House, 1967
Buku Teks