The following illustrate the principles.
The 1:1:1:1 quaternary compound between bromine, chlorine, iodine and phosphorus:
*  phosphorus bromide chloride iodide (phosphorus is the most electropositive, the others are all designated as electronegative and are sequenced alphabetically)
The ternary 2:1:5 compound of antimony, copper and potassium can be named in two ways depending on which  are designated as electronegative.
*CuKSb copper pentapotassium diantimonide, (both copper and potassium are designated as electropositive and are sequenced alphabetically)
*KCuSb pentapotassium diantimonide cupride (only potassium is designated as electropositive and the two electronegative elements are sequenced alphabetically) (Note the red book shows this example incorrectly)