Gaya APA
Income: Analysis and Policy. (1969).
Amerika:
MCGraw Hill Book Company.
Gaya Chicago
Income: Analysis and Policy.
Ed. 2.
Amerika:
MCGraw Hill Book Company,
1969.
.
Gaya MLA
Income: Analysis and Policy.
Ed. 2.
Amerika:
MCGraw Hill Book Company,
1969.
.
Gaya Turabian
Income: Analysis and Policy.
Amerika:
MCGraw Hill Book Company,
1969.
.