Curtis, Eleanor, author
Wiley-Academy , 2003
Buku Teks
Priska Novia Sabati, author
Fakultas Psikologi Universitas Indonesia, 2014
UI - Tesis (Membership)
Steele, James, author
Academy Editions, 1996
Buku Teks
Steele, James, author
Academy Editions, 1996
Buku Teks
Heathcote, Edwin, author
Wiley-Academy, 2001
Buku Teks