Tienke Ambar Wulandari
H. Soetono Djoemadhi : catatan kecil
[publisher not identified], 2001
 Buku Teks
Redfield, Robert
Fieldwork: the correspodence of Robert Redfield & Sol Tax
Westview Press, 1991
 Buku Teks SO
Ennis, Robert H.
Critical thinking/Robert H. Ennis
Prentice-Hall, 1996
 Buku Teks
MacLaine, Allan H.
Robert Fergusson / by Allan H. MacLaine
Twayne Publishers, 1965
 Buku Teks
Ennis, Robert Hugh
Critical thinking/ Robert H. Ennis
Prentice-Hall, 1996
 Buku Teks