Gaya APA
Kagen, Sergius. (1960).
On Studying Singing .
New York:
Dover Publication.
Gaya Chicago
Kagen, Sergius.
On Studying Singing.
New York:
Dover Publication,
1960.
.
Gaya MLA
Kagen, Sergius.
On Studying Singing.
New York:
Dover Publication,
1960.
.
Gaya Turabian
Kagen, Sergius.
On Studying Singing.
New York:
Dover Publication,
1960.
.