TY  - BOOK
T1  - Principles and practice in second language acquisition
A1  - Krashen, Stephen D.
LA  - English
PP  - Oxford
PB  - Pergamon Press
YR  - 1982
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217603780644
OP  - 202
CN  - P 53 K73
KW  - Language and languages : Study and teaching.
KW  - Language acquisition.
ER  -