Gaya APA
ABT, Franz. ([s.a.]).
Practical singing tutor for bass and baritone Op. 474 .
New York:
[s.n.].
Gaya Chicago
ABT, Franz.
Practical singing tutor for bass and baritone Op. 474.
New York:
[s.n.],
[s.a.].
.
Gaya MLA
ABT, Franz.
Practical singing tutor for bass and baritone Op. 474.
New York:
[s.n.],
[s.a.].
.
Gaya Turabian
ABT, Franz.
Practical singing tutor for bass and baritone Op. 474.
New York:
[s.n.],
[s.a.].
.