Metcalfe, E. (1987). Analytical Chemistry by Open Learning: Introduction to Analytical Chemistry. John Wiley & Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMetcalfe, E. Analytical Chemistry by Open Learning: Introduction to Analytical Chemistry. Chichester: John Wiley & Sons, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMetcalfe, E. Analytical Chemistry by Open Learning: Introduction to Analytical Chemistry. John Wiley & Sons, 1987.
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