Rodgers, R., Hammerstein, O., & Walker, D. (2019). Exit of Billy & heavenly friends. Concord Theatricaks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRodgers, Richard, Oscar Hammerstein, और Don Walker. Exit of Billy & Heavenly Friends. [S. l.]: Concord Theatricaks, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRodgers, Richard, et al. Exit of Billy & Heavenly Friends. Concord Theatricaks, 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.