Gaya APA
Easton, L, B., Klein, M. (1981).
Expressways : a Basal languange program, level 3 .
Oklahoma City:
The Economy Company.
Gaya MLA
Easton, Lois, Brown., Klein, Marvin.
"Expressways : a Basal languange program, level 3".
Oklahoma City:
The Economy Company,
1981.
Text.