Gaya APA
Umicall, Paul Stadler. (1980).
The University Microfilms International .
USA:
.
Gaya Chicago
Umicall, Paul Stadler.
The University Microfilms International.
USA:
,
1980.
Text.
Gaya MLA
Umicall, Paul Stadler.
The University Microfilms International.
USA:
,
1980.
Text.
Gaya Turabian
Umicall, Paul Stadler.
The University Microfilms International.
USA:
,
1980.
Print.