Willen, B., Strals, N., & Lupton, E. (2009). Lettering & type: Creating letters and designing typefaces. Princeton Architectural Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWillen, Bruce, Nolen Strals, और Ellen Lupton. Lettering & Type: Creating Letters and Designing Typefaces. New York: Princeton Architectural Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWillen, Bruce, et al. Lettering & Type: Creating Letters and Designing Typefaces. Princeton Architectural Press, 2009.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.