Phillips, A., & Phillips, T. (1994). Business Opportunities: Teacher's book. Oxford: Oxford University Press.
Chicago Style aipamenaPhillips, Anna, và Terry Phillips. Business Opportunities: Teacher's Book. Oxford: Oxford University Press, 1994.
MLA aipamenaPhillips, Anna, và Terry Phillips. Business Opportunities: Teacher's Book. Oxford: Oxford University Press, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.