Jackson, V. B., & Heckler, B. W. (1991). Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle.
シカゴスタイル引用形Jackson, Vicki B., , Belinda W. Heckler. Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle, 1991.
MLA引用形式Jackson, Vicki B., , Belinda W. Heckler. Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle, 1991.
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