Johnstone, D. (1994). Greens in the European Parliament: A new sense of purpose for Europe, record and prospects of the first Green Political Group in the European Parliament. The Parliament.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnstone, Diana. Greens in the European Parliament: A New Sense of Purpose for Europe, Record and Prospects of the First Green Political Group in the European Parliament. [Brussels, Begium]: The Parliament, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnstone, Diana. Greens in the European Parliament: A New Sense of Purpose for Europe, Record and Prospects of the First Green Political Group in the European Parliament. The Parliament, 1994.
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