APA Style
Ten interactive English lessons. (1997).
:
Heinemann.
Chicago Style
Ten interactive English lessons.
.
:
Heinemann,
1997.
CDROM.
MLA Style
Ten interactive English lessons.
.
:
Heinemann,
1997.
CDROM.
Turabian Style
Ten interactive English lessons.
:
Heinemann,
1997.
CDROM.