Laverty, C. e. a. (1971). The unity of english. Five basic focal points. Harper and Row.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLaverty, Carroll et al. The Unity of English. Five Basic Focal Points. New York, Estados Unidos: Harper and Row, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLaverty, Carroll et al. The Unity of English. Five Basic Focal Points. Harper and Row, 1971.
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