The Short Version
The claim stitches together a real but poorly sourced Gorden taxonomy with unsubstantiated scholarly attributions. While several secondary sources do associate four communication functions (social, expressive, ritual, instrumental) with William I. Gorden, the assertion that Wright (1986) and Effendy (2017) support this framework is not demonstrated by the evidence. Wright's 1986 work addresses a distinct mass communication model, and no Effendy (2017) source is available for verification. The "formal function" label for instrumental communication is also unverified.