Douglas J. Eder [and others]
McGraw-Hill Higher Education, 2004
Buku Referensi
Starr, Cecie, author
Brooks/Cole, 2012
Buku Teks
Burke, Shirley R., author
John Wiley & Sons, 1980
Buku Teks
Silverstein, Alvin, author
John Wiley & Sons, 1983
Buku Teks
Rohen, Johannes W., author
Lippincott Williams & Wilkins, 2011
Buku Referensi