Bowers, Fredson
St. Paul's Bibliographies, 1986
Buku Teks
Mortimer, Mary
TotalRecall Publications, 2007
Buku Teks
Lazarinis, Fotis
Chandos, 2015
eBooks
Procter, Margaret
Gower, 2000
Buku Teks
Minanuddin
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2004
UI - Tesis Membership