Ackert, P., & Partricia Ackert; Nicki Giroux de Navarro. (1994). Cause & effect: Intermediate reading practice. Boston, Mass: Heinle & Heinle Publishers.
Čikaški stil citiranjaAckert, Partricia, i Partricia Ackert; Nicki Giroux de Navarro. Cause & Effect: Intermediate Reading Practice. Boston, Mass: Heinle & Heinle Publishers, 1994.
MLA način citiranjaAckert, Partricia, i Partricia Ackert; Nicki Giroux de Navarro. Cause & Effect: Intermediate Reading Practice. Boston, Mass: Heinle & Heinle Publishers, 1994.
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