Hollingsworth, Keith
Wayne State University, 1963
Buku Teks
Paris, Bernard J., author
Indiana University Press, 1974
Buku Teks
Larson, Jil, author
Cambridge University Press, 2009
eBooks
edited by Patrick Brantlinger and William B. Thesing
Blackwell, 2002
Buku Referensi
Richard Saptenno, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1987
UI - Skripsi (Membership)