Some thoughts on the study of English as a foreign language /
Paul Christophersen.
APA Citation
Christophersen, P. (1957). Some thoughts on the study of English as a foreign language. Oslo: Norlis.
MLA Citation
Christophersen, Paul. Some Thoughts On the Study of English As a Foreign Language. Oslo: Norlis, 1957.
Warning: These citations may not always be complete (especially for serials).