Não informado. (1973). Annual journal. Royal New Zealand Institute of Horticulture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annual Journal. Christchurch, Nova Zelandia: Royal New Zealand Institute of Horticulture, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annual Journal. Royal New Zealand Institute of Horticulture, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.