Richard Saptenno, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1987
UI - Skripsi Membership
Hollingsworth, Keith
Wayne State University, 1963
Buku Teks
Cambridge University Press, 1994
eBooks
edited by Patrick Brantlinger and William B. Thesing
Blackwell, 2002
Buku Referensi
Paris, Bernard J., author
Indiana University Press, 1974
Buku Teks