Lungton, R. C. (1986). American topics: A reading-vocabulary text for speakers of English as a second language (2a. ed.). Prentice Hall Regents.
Chicagoスタイル(17版)引用形式Lungton, Robert C. American Topics: A Reading-vocabulary Text for Speakers of English as a Second Language. 2a. ed. Englewood Cliffs: Prentice Hall Regents, 1986.
MLA(9版)引用形式Lungton, Robert C. American Topics: A Reading-vocabulary Text for Speakers of English as a Second Language. 2a. ed. Prentice Hall Regents, 1986.
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