Gaya APA

VIOTTI, P, R., KAUPPI, M, V. (2014). Pearson New International Edition (International Relation Theory) . of Amerika: Pearson Education Limited.

Gaya MLA

VIOTTI, PAUL, R.., KAUPPI, MARK, V.. "Pearson New International Edition (International Relation Theory)". of Amerika: Pearson Education Limited, 2014. Text.