Woolf, Leonard
Penguin Books Limited , 1937
Buku Teks
Gerungan, W. A., author
Eresco, 1972
Buku Teks
DeLamater, John D., author
Colorado Westview Press, 2014
Buku Teks
Pines, Ayala, author
McGraw-Hill, 1993
Buku Teks
Baron, Robert A., author
Pearson, 2009
Buku Teks