Gaya APA
Understanding Labor Problems. (1959).
Amerika:
MCGraw Hill Book Company.
Gaya Chicago
Understanding Labor Problems.
.
Amerika:
MCGraw Hill Book Company,
1959.
.
Gaya MLA
Understanding Labor Problems.
.
Amerika:
MCGraw Hill Book Company,
1959.
.
Gaya Turabian
Understanding Labor Problems.
Amerika:
MCGraw Hill Book Company,
1959.
.