Roy,P N. (2019). International Trade: Theory and Practice (second.). New Age International Publishers.
Cytowanie według stylu Chicago (wyd. 17)Roy,P N. International Trade: Theory and Practice. second. New Delhi: New Age International Publishers, 2019.
Cytowanie według stylu MLA (wyd. 9)Roy,P N. International Trade: Theory and Practice. second. New Age International Publishers, 2019.