We know that plant cells have dictyosomes instead of golgi but in my book it was written that plant cells have golgi apparatus?
The Golgi apparatus, also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells.
In plants, Golgi stacks are not concentrated at the centrosomal region and do not form Golgi ribbons. Organization of the plant Golgi depends on actin cables and not microtubules. The common feature among Golgi is that they are adjacent to endoplasmic reticulum (ER) exit sites.
The [trans Golgi network] may act as an early endosome in yeast and plants.
The dictyosome is a part of the Golgi apparatus. There is no english wikipedia for dictyosome but here is the french one