Stepan, P., & Billeter, E. (1999). Icons of photography: The 20th century / ed. by Peter Stephan. With contributions by: Erika Billeter. Prestel.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStepan, Peter, और Erika Billeter. Icons of Photography: The 20th Century / Ed. by Peter Stephan. With Contributions by: Erika Billeter. Munich ; London ; New York: Prestel, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStepan, Peter, और Erika Billeter. Icons of Photography: The 20th Century / Ed. by Peter Stephan. With Contributions by: Erika Billeter. Prestel, 1999.
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