Letters….

MLA

Hack, Matthew, et al. “Letters….” Professional Engineering, vol. 20, no. 22, Dec. 2007, pp. 16–19. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=28038469&authtype=sso&custid=ns315887.

APA

Hack, M., Beck, A., Miller, D., Halstead, J., Cargill, A., Prior, A., Lucas, M., Young, P., Simmons, D., Pemberton, E., Stacey, G., White, D., Gayfer, J., Spare, P., Cowell, B., Firth, R., Lindsay, R., & Mortimer, J. (2007). Letters…. Professional Engineering, 20(22), 16–19.

Chicago

Hack, Matthew, Andrew Beck, David Miller, John Halstead, Alan Cargill, Alan Prior, Matt Lucas, et al. 2007. “Letters….” Professional Engineering 20 (22): 16–19. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=28038469&authtype=sso&custid=ns315887.