Roberts, B. C. (2020). Nikki on the line (1st trade pbk. ed.). Little, Brown and Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoberts, Barbara Carroll. Nikki on the Line. 1st trade pbk. ed. New York: Little, Brown and Co., 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoberts, Barbara Carroll. Nikki on the Line. 1st trade pbk. ed. Little, Brown and Co., 2020.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.