APA-referens

Gappert, G., & Knight, R. V. (1982). Cities in the 21st century. Sage Publications.

Chicago-stil citat

Gappert, Gary, och Richard V. Knight. Cities in the 21st Century. Beverly Hills: Sage Publications, 1982.

MLA-referens

Gappert, Gary, och Richard V. Knight. Cities in the 21st Century. Sage Publications, 1982.