Gaya APA
Economics Volume II: Modern Economic Problems. (2020).
United States of America:
Project Gutenberg.
Gaya Chicago
Economics Volume II: Modern Economic Problems.
Vol. 2.
United States of America:
Project Gutenberg,
2020.
.
Gaya MLA
Economics Volume II: Modern Economic Problems.
Vol. 2.
United States of America:
Project Gutenberg,
2020.
.
Gaya Turabian
Economics Volume II: Modern Economic Problems.
United States of America:
Project Gutenberg,
2020.
.