Kelley, Kitty
Granada Publishing, 1978
Buku Teks
Schlesinger, Arthur Meier, author
Fawcett Publications, 1965
Buku Teks
Hariyani Sri Lestarinsih, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2004
UI - Skripsi Membership
Strober, Gerald S., author
Harper Perennial, 1994
Buku Teks
by Martin Agronsky ... [et.al.]
Simon and Schuster, 1961
Buku Teks