Davenport, Dawn
Broadway Books, 2006
Buku Teks
Hernandez, Edwin A. Peraza
Springer Cham, 2019
eBooks
Drago, Carl
Blackwell Publishing, 2007
Buku Referensi
Ziegler, Kathleen
Rockport Publishers, 1994
Buku Referensi
Drago, Carl
Blackwell, 2014
Buku Teks