APA (7th ed.) Citation

Simpson, B. J., & Purdy, M. T. (1984). Housing on sloping sites: A design guide. Construction Press.

Chicago Style (17th ed.) Citation

Simpson, Barry J., and M. T. Purdy. Housing on Sloping Sites: A Design Guide. London New York: Construction Press, 1984.

MLA (9th ed.) Citation

Simpson, Barry J., and M. T. Purdy. Housing on Sloping Sites: A Design Guide. Construction Press, 1984.