APA (7 वां संस्करण) प्रशस्ति पत्र

Williams, G., & Lukin, A. (2004). The development of language: Functional perspectives on species and individuals (1a. ed.). Continuum.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Williams, Geoff, और Annabelle Lukin. The Development of Language: Functional Perspectives on Species and Individuals. 1a. ed. Londres: Continuum, 2004.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Williams, Geoff, और Annabelle Lukin. The Development of Language: Functional Perspectives on Species and Individuals. 1a. ed. Continuum, 2004.