Approaches to teaching foreign languages
edited by M.G. Hesse
North-Holland, 1975
 Buku Teks SO
Richards, Jack C.
Approaches and methods in language teaching
Cambridge University Press, 2006
 Buku Teks SO
Soenjono Dardjowidjojo, 1938-
Rampai Bahasa, pendidikan, dan budaya: kumpulan esai
Yayasan Obor Indonesia, 2003
 Buku Teks SO
Richards, Jack C.
Approaches and methods in language teaching : a discription and analysis
Cambridge University Press, 1994
 Buku Teks SO
Lumban Tobing, Christina Ruth Elizabeth
Pengadjaran dan bahasa asing (Enquete 1952)
[Publisher not identified], 1953
 Buku Klasik