Hubbard, George U., author
Van Nostrand Reinhold, 1981
Buku Referensi
Niehaus, Richard J., author
John Wiley, 1979
Buku Teks
Beatty, Ken, author
Pearson Education, 2003
Buku Teks
Yohan Payan, editor
Springer, 2012
eBooks
Steinberg, Esther R., author
Erlbaum Associates, 1991
Buku Teks