Put the commission names in the Author field and a comma at the end, so they are not treated as names. Put everything else in the title and year published in the Year field. Using Harvard and entering them as Book, should give you outputs like you show below. You might also try Report, which doesn’t have any template, so it would be treated as in the Generic Template. If it isn’t quite right, you can copy the generic into a Report template and tweak it to get the output you think most appropriate, especially if there are other fields that may crop up from time to time.