Loeffler, Agnes G.
Jones & Bartlett Learning, 2020
Buku Referensi
Linsley, Paul
Sage, 2019
Buku Teks
Campbell, Kenneth L., 1955-
Wiley-Blackweell, 2011
Buku Teks SO
Porche, Demetrius James
Jones and Bartlett Learning, 2012
Buku Teks
Olden, Peter C.
AUPHA Press, 2011
Buku Teks