Lua APA (7ú heag.)
Tweit, S. J., & York, S. (2009). Walking nature home: A life's journey. University of Texas Press.
Lua i Stíl Chicago (17ú heag.)
Tweit, Susan J., agus Sherrie York. Walking Nature Home: A Life's Journey. Austin: University of Texas Press, 2009.
Lua MLA (9ú heag.)
Tweit, Susan J., agus Sherrie York. Walking Nature Home: A Life's Journey. University of Texas Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.