Gaya APA
Easton, L, B., Klein, N. (1981).
Expressways a Basal Language Program level 5 .
United States of America:
Economy Company.
Gaya MLA
Easton, Lois, Brown., Klein, Narvin.
"Expressways a Basal Language Program level 5".
United States of America:
Economy Company,
1981.
Text.