APA-referens (7:e uppl.)

Robertson, M. (2014). Sustainability: Principles and practice. Routledge.

Chicago-referens (17:e uppl.)

Robertson, Margaret. Sustainability: Principles and Practice. New York: Routledge, 2014.

MLA-referens (9:e uppl.)

Robertson, Margaret. Sustainability: Principles and Practice. Routledge, 2014.