Agresto, John
Cornell University Press, 1984
Buku Teks
Schwartz, Bernard, author
The Ronald Press, 1957
Buku Teks
Schwartz, Bernard, author
The Ronald Press, 1957
Buku Teks
Clark, Tom S., author
Cambridge University Press, 2019
eBooks
Ball, Howard
Associated University Press,Inc., 1971
Buku Teks