Jackson, Paul, author
Chancellor, 1994
Buku Referensi
Davenport, Dawn, author
Broadway Books, 2006
Buku Teks
Hernandez, Edwin A. Peraza, author
Springer Cham, 2019
eBooks
Drago, Carl, author
Blackwell Publishing, 2007
Buku Referensi
Ziegler, Kathleen, author
Rockport Publishers, 1994
Buku Referensi