Recommended citation for entire Coastal Engineering Manual:


U.S. Army Corps of Engineers. 2002. Coastal Engineering Manual. 
Engineer Manual 1110-2-1100, U.S. Army Corps of Engineers, Washington, D.C. (in 6 volumes). 




Recommended citation for individual chapters:


Author. 2002. Chapter Title. In: Part Chairman, Coastal Engineering Manual, Part XX , Part Name Chapter XX-X , 
Engineer Manual 1110-2-1100, U.S. Army Corps of Engineers, Washington, DC.


For example:


Resio, D., Bratos, S., and Thompson, E. 2002. 
Meteorology and Wave Climate. In: Vincent, L., and Demirbilek, Z. (editors), Coastal Engineering Manual, Part II, 
Hydrodynamics, Chapter II-2, Engineer Manual 1110-2-1100, U.S. Army Corps of Engineers, Washington, DC.