Bower, Joseph L.
Harvard University, 1970
Buku Teks
Buckley, Page S.
Instrument Society of America, 1985
Buku Teks
Page, Sheila, author
Overseas Development Institute, 2000
Buku Teks
edited by Maribeth Erb, Priyambudi Sulistiyanto, and Carole Faucher
Routledge, 2017
Buku Teks
Frost, Ellen L., author
Lynne Rienner, 2008
Buku Teks