Gaya APA
First steps in listening. (1990).
tempaterbit:
penerbit.
Gaya Chicago
First steps in listening.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya MLA
First steps in listening.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya Turabian
First steps in listening.
tempaterbit:
penerbit,
1990.
Print.