Supreme Court of Missouri says

"Court holds that limited partnerships, as statutory entities, may appear in the courts of this state only through an attorney licensed or admitted to practice here by this Court. "

Nalor Senior Citizens Housing et al. v. Sides Constr. Co. Inc. et. al. 423 S.W.3d 238, at 243. 

https://scholar.google.com/scholar_case?case=7241892929356225591&q=naylor+v.+sides&hl=en&as_sdt=4,205