Fried-booth, D. L., & Hashemi, L. (1988). PET Practice Tests: For the New Cambridge Prelimimary English Test. New York: Cambridge University Press.
Dyfyniad Arddull ChicagoFried-booth, Diana L., và Louise Hashemi. PET Practice Tests: For the New Cambridge Prelimimary English Test. New York: Cambridge University Press, 1988.
Dyfyniad MLAFried-booth, Diana L., và Louise Hashemi. PET Practice Tests: For the New Cambridge Prelimimary English Test. New York: Cambridge University Press, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.