Add punctuation: It has 2 bedrooms a bathroom with shower living room with fully equipped kitchenette
A: It has 2 bedrooms, a bathroom with shower, living room with fully equipped kitchenette.

Add punctuation: Studies have also showed that people who are deprived of sleep for a period of time will develop psychoses
A: Studies have also showed that people who are deprived of sleep for a period of time will develop psychoses.

Add punctuation: We have been awarded the ISO 14001 certification
A:
"We have been awarded the ISO 14001 certification.